centimetres-60

one hundred and sixty-four centimetres 怎么读厘米

一码=0.9144米

1、码碯（亦作“玛瑙”。一种似玉而次于玉的宝石）。码，码碯，石次玉也。——《玉篇》

2、表示数目的符号。如：数码，页码；暗码；明码；号码；密码；价码。

3、计算数目的用具。如：筹码，砝码；码目（犹数目）；码钱（赌博时用以代现金的筹码）；码洋（旧时指商品上标的有折扣的定价）。

4、英制长度单位，美制码等于0.9144米，在英国，则1码等于保存在威斯敏斯特商务部标准局的青铜棒两个金塞子上横线标记之间的距离（在62°F时）(缩写yd）。

5、指垒成的堆。相当于垛。如：码头（船只停泊处；指交通便利的商业城市；旧指流氓活动霸占的地盘）。

扩展资料

纺织丝绸产品评价常用单位，是每平方米织物的重量，单位是“克/平方米”（g/m2），缩写为FAW。面料的克重一般为平方米面料重量的克数，克重是针织面料的一个重要的技术指标，粗纺毛呢通常也把克重作为重要的技术指标。

牛仔面料的克重一般用“盎司（OZ）”来表达，即每平方码面料重量的盎司数，如7盎司、12盎司牛仔布等；纺织品评价常用单位。丝绸面料常用“姆米(m/m)=2.5/0.58064=4.3056克/平方米”表示重量/单位。纱线则以支数和号数表示重量（长度）/单位。

经纱密度 ——面料长度方向；该向纱线称做经纱；其1英寸内纱线的排列根数为经密（经纱密度）；

纬纱密度 ——面料宽度方向；该向纱线称做纬纱，其1英寸内纱线的排列根数为纬密（纬纱密度）；

密度 ——用于表示梭织物单位长度内纱线的根数，一般为1英寸或10厘米内纱线的根数，中国国家标准规定使用10厘米内纱线的根数表示密度，但纺织企业仍习惯沿用1英寸内纱线的根数来表示密度。如通常见到的“45X45/108X58”表示经纱纬纱分别45支，经纬密度为108、58。

幅宽 ——面料的有效宽度，一般习惯用英寸或厘米表示，常见的有36英寸、44英寸、56-60英寸等等，分别称作窄幅、中幅与宽幅，高于60英寸的面料为特宽幅，一般常叫做宽幅布，当今中国特宽面料的幅宽可以达到360厘米。幅宽一般标记在密度后面，如：3中所提到的面料如果加上幅宽则表示为：“45X45/108X58/60"”即幅宽为60英寸。

克重 ——面料的克重一般为平方米面料重量的克数，克重是针织面料的一个重要的技术指标，粗纺毛呢通常也把克重作为重要的技术指标。牛仔面料的克重一般用“盎司（OZ）”来表达，即每平方码面料重量的盎司数，如7盎司、12盎司牛仔布等；

 色织 ——日本称做“先染织物”，是指先将纱线或长丝经过染色，然后使用色纱进行织布的工艺方法，这种面料称为“色织布”，生产色织布的工厂一般称为染织厂，如牛仔布，及大部分的衬衫面料都是色织布；参考资料。

克重_百度百科 

海龟的英文简介。

one hundred and sixty-four centimetres 。

翻译是：一百六十四厘米

centimetres [ˈsentiˌmi:təz]， n. 厘米( centimetre的名词复数 );。

英语单词154、157、183、144、192、136、121、118厘米怎么写

稜 skin turtle Division (Dermochelyidae) and the turtle Division (Cheloniidae) of the sea-dweller turtle.Adapt to the aquatic life, limb into fin-shaped, conducive to swim.Generally only during the breeding season out of water coming ashore.Female turtle eggs will be digging holes at the beach.稜 skin turtle (Dermochelyscoriacea) was extant turtle species of approximately 2.1 meters (7 ft), weighing about 540 kilograms (1, 200 pounds).End of the two former fin is approximately 2.7 between span meters.The most broadly long up to 3 meters, weighing about 900 kg.Composed by strut carapace, slightly overburden to sepia or black leather quality skin.Back 7 obvious longitudinal 稜, there are 5 of the abdomen.On the world's oceans, longer than swimming, and omnivorous.。

稜 Dermochelys coriacea turtles (skin)。

Sea turtles are turtles turtle species.Presence in Atlantic, Pacific and Indian oceans.Made in China, belonging to the Japan Sea turtles from Shandong, South to have distribution Beibu Gulf offshore.Up to the life of 1 m, maximum size of around 150-year-old ... with a pair of overhead his forehead squamous cell.Forelimb propeller, extremities as taking longer than the hind limbs, medial, toe has got a claw.Head, neck and limbs could shrink into KAB.Feed mainly on seaweed.Living in the Atlantic, Pacific and Indian Ocean, to land their eggs, hatchling.Meat edible fats can refinery.As a national class two animal protection. 。

Turtle maxillary-mandibular flat out, slightly curved to the bait, JAWS rim jagged notched.On the forehead and squamous cell 1.Heart-shaped carapace assumes.Arrange Scutum inlay.Vertebral shield 5 slices; rib guilders per side 4 tablets; 11 per side margin shield.The paddle-shaped extremities.Forelimb longer than the hind legs, claws medial with 1.Male tail is long, one half of $ body length.Forelimb claws large, curved hook.Carapace olive or brown-coloured stripes, clutter-taking; abdominal KAB yellow.Living in the upper sublittoral.To fish, cephalopod animals, crustacea and algae, etc.The annual 4 to 10 months for the breeding season, often in the vicinity of the mating surface of the reef, 3 ~ 4 hours.Female at night to get to shore on the beach, forelimb to dig a deep and body high considerable Tai Hang, pits, and then to hind alternating to dig a diameter 20 cm, deep 50 cm or so ” “ eggs hang, in the pits to lay eggs.Producing BI to cover, and then back to the sea.The annual spawn several times, 157 per production 91 ~.Egg white, round, 41 ~ 43 mm diameter, shell, the Shura soft leather quality.Incubator 50 ~ 70 days.。

Sea turtle life up 152 years, is animal well-deserved 老寿星 animals longest life expectancy — turtles turtles as early as the emergence of 230 million years ago, on the planet is the famous ” “ living fossils.As far as the world of Guinness record, the turtle's life up 152 years, is a well-deserved 老寿星 in animals.Precisely because the turtle is the longevity of animals in the ocean, so the people along the instruction will still be turtle regarded as the mascot of longevity, just as the mainland people with pine trees the same as a symbol of longevity, coastal people also turn the turtle seen as a symbol of longevity, and have ” “ Wannian turtle. The ocean is currently a total of eight species of sea turtles, where there are four produced in our country, principally in Shandong and Fujian, Taiwan and Hainan, Zhejiang and Guangdong coast, the maximum number of our group is the green turtles.。

[edit types of this paragraph]。

In the ocean Live 8 species of sea turtles: a leatherback turtle, hawksbill turtles and red head, olive green squamous turtle, big turtles, green sea turtles, black turtle (Pacific Lepidochelys) peace back turtles.All of the sea turtles were classified as endangered species.。

Since male turtles and young turtles go ashore, we will not be very difficult to know the sea turtle survival in the wild.The number of the sea turtles are generally calculated according to their hatching rate.。

Research shows that all kinds of immature sea turtles are different degrees of diminished.Especially big turtles and leatherback turtles, all sea turtle disappearing kinds of greatest risk.The maximum number is olive green squamous turtle several to the Indian coast nesting.。

Green turtle (Chelonia mydas) body large and heavy carapace length of about 0.7 ∼ 1 meters, weighing about 1.4 kilograms. ∼ 90The largest body length about 1.2 meters above sea level, 585 kilograms in weight.Carapace width and smooth, full-body-Brown or light green, distributed in coastal areas of the world; the main warm waters; feeding of seaweed and unlike other turtles sometimes ashore in the Sun. 。

Caretta caretta turtle () for a large, similar to the green turtles, but the larger head.Micro-reddish-brown or brown carapace length of about 0.7 ∼ 2.1 meters.Large specimens General weighing about 135 kilograms, but nearly 400 kilograms in weight.It is rumored that their temperament ferocious carnivorous, spread throughout the world's oceans. 。

Eretmochelys imbricata) hawksbill (body smaller.Its scientific name according to the carapace arranges the overlying plate of tile.The warm waters around the world ocean.Aggressive to feed animals and plants.KAB long about 40 ∼ ∼ 55 cm (16, 22-inch) weighs about 45 kilograms of 13 ∼ ∼ 100 pounds (29). 。

RI Dali turtle l. (Lepidochelys) is a small turtle, width, a circle.Atlantic RI Dali turtle (m. kempii) gray, about 60 ∼ 79 cm.Produced in the Gulf of Mexico, accidental Gulf stream, an East-North-New England, Great Britain and Europe.This kind of turtle and tortoise commonly known as "hybrids", this name originates from people mistook Atlantic RI Dali turtle is green turtles and turtle after generation.Pacific Dali turtle (L. olivacea) on the Indo-Pacific region. warm-water areaThe type of the body is greater than the Atlantic, slightly greenish to animals and plants.。

[edit feature of this paragraph]。

Turtle is in existence for 1 billion years of prehistoric reptiles.Sea turtle scales and quality of the shell, although you can stay under water for several hours, but still want to regulate body temperature floating surface and breathe.。

It is the largest sea turtle, Leatherback turtle as long as 2 metres, over 1 ton.The smallest is olive green squamous turtle, 75 cm long, 40 kg heavier. 。

Turtle uniqueness is the tortoise shell.It can protect sea turtles are inviolable, let them swim around freely in the harbour.In addition to the leatherback turtle, all of the sea turtles have shells.Leatherback turtles with thick oily skin, presents 5 longitudinal edged .. 。

And the tortoise, sea turtles which can't be in the head and limbs shrink back to the shell.Like wings-like forelimbs mainly used to promote the turtle forward, and the hind limbs like rudder direction in the grip of travelling time.。

In mature male and female turtle prior to the body is the same.When male turtles matures, tail thickened with variable-length, because the reproductive organs in relation to the bottom of the tail.。

Different types of sea turtles have different mature age.The hawksbill turtles 3 years old mature, turtles-50-year-old mature.Turtles must be at the land lay their eggs, once can yield 50-200 a ping-pong ball-shaped eggs, but the chances of young sea turtle survival respirable.。

[edit this paragraph] Habitat and range of activities。

Most of the sea turtle survival in a relatively shallow coastal waters and bays, lagoons, coral reefs and sea-river estuary.We usually warm and comfortable throughout the world's seas found turtles.。

Different kinds and the same type of sea turtle populations within each migration habits.Some turtles to swim to several kilometers away from the nesting and feeding turtles.While the leatherback turtle migration farthest, they want to 5000 kilometers of beach nesting.Black turtle is like in their distribution area of the southernmost and northernmost turtles breeding and feeding.。

[edit this paragraph] diet。

Turtles whilst no teeth, but their beak but very sharp, different species have different eating habits.Turtle is divided into plant-eating, meat and omnivorous.。

Red-headed turtle and tortoise and squamous cell, you can have JAWS milled crabs, some coral Mollusca, jellyfish.While the hawksbill turtle's upper beak hook Qu resembling olecranon, available from the coral interstices identify sponge, shrimps and squid.Green Turtle and black turtle palate assumes the jagged, mainly eats the seaweed and algae. 。

Turtles eat aquatic plants also swallowed seawater, ingest a large number of salt.Beside the sea turtle some special of the lacrimal gland expel these salts, creating a sea turtles on the shore of “ tears ” phenomenon.。

[edit] this paragraph survive threat。

Mainly hatching areas damaged and illegal poaching.。

Incubation area damaged。

The development of the beach greatly reduce sea turtle nesting sites.Turtles are no longer ashore incubation for various reasons: human activities and noise pollution and waste barricaded the turtles way, and if turtles eat the rubbish they may die; Beach man-made light allow turtles to mistake is misled them in the daytime, evening incubation, it will make just hatching out want to go back to sea turtles lose direction.In India Orissa incubation of olive green sea turtles are also facing serious threats.。

Illegal poaching。

Turtle shells are used to tabulate Combs, spectacle frames, jewelry and other cosmetics and priced very expensive.Turtle fat was used to make soup, sea turtle eggs is also considered wild game.。

[edit this paragraph] sea turtle protection。

Sea turtle protection work into a high-speed development period, coastal economic activities and harmful fishing operations subject to monitoring.Sea turtle conservation work has been much progress has been achieved.Australia has launched a project, investing millions of dollars in community in the turtle conservation activities, and trying to find ways to solve the problem of ghost nets.Indonesia is conducting an advanced study to determine the fishing industry and the turtle survival status of mutual relations, and with industry to develop appropriate mitigation measures.Seychelles have developed innovative ways to make the participation of private enterprise to actual conservation action.At present, eight countries have already begun implementation focuses on turtle protection of national plans, whereas the other ten countries are also plans to introduce similar schemes.Decades, Austria, Oman, Seychelles and South Africa are monitoring the number of various since sea turtle; otherwise several countries in the last decade have also implemented a protection scheme.United Nations Environment Programme (UNEP) in Bangkok Office is responsible for coordinating the agreement executed by Douglas Hykle said, this national report made it clear that countries are making greater efforts, monitoring, management and protection of the countries of the turtles.。

The quantity of green turtles in Sudan, Oman, but in Indonesia and the Philippines, due to unsustainable poaching turtle eggs and collected, the quantity of green turtles.It is reported in the Indian Embassy in the nest, thousands of Lepidochelys quantity continues to decline.While in Thailand, Lepidochelys quantity has been very scarce, it is estimated the number only and has a history of 5 per cent of the high level. Signatory pointed out that natural phenomena such as predator-prey is the largest sea turtle facing threats, immediately following it is incidental capture of coastal fisheries issues.It is reported both threats involving 18 countries by about 35 per cent of the scene in strength is “ moderate to strong ”.In 14 countries of the 20 per cent of field investigations, turtle egg collection have serious threats at all ranks third.After a thorough investigation, the traditional turtle meat and turtle egg consumption remains at three quarters of the signatory States. 。

Fishery is also becoming the focus of concern.Half of the signatory to the report of fixed gill net have severe effects on sea turtle.Shrimp trawling cause turtle become Deputy catches by, has been a serious problem, however, only one signatory taken effective measures to solve this problem.There are other harmful illegal fishing activities have been put on record, some destructive fishing methods start coming back, such as the use of explosives and poison. 。

The development of coastal areas, such as the negative consequences of tourism, has also become a focus of attention.The project's Advisory Committee, said Dr Jack Frazier: “ in most of the Indian Ocean region, coastal development, particularly tourism facilities construction quickly.On sea turtle nesting beaches and turtle foraging and rest of the nearshore beaches, the negative effects caused by growing significantly.”

Is expected to have more than 30 countries of the official delegation will attend the Bali meeting.The meeting will discuss an ambitious conservation and management plan to implement the programme involves the field of the 24 project.The meeting will focus case studies, including coastal development problems, fisheries and the turtle of a large project in India and Indonesia to tuna longline fishing industry.The meeting also discusses the establishment of a turtle and endangered habitats in the network. 。

Recently also will introduce some sharing of information and monitoring turtle number of new tools, such as recently upgraded IOSEA online reporting system.The line database at: http://www.ioseaturtles.org/report.php, website involved, the Indian Ocean and Southeast Asian turtle haunted 700 key locations.Users can query the system to obtain relevant information, such as a sea turtle species occur, they place in a particular threat faced by, and is implementing mitigation measures that ongoing research activities.Google maps provide all information of high resolution satellite images.。

[edit] law of this paragraph。

All turtles are in the CITES Convention (CITES) law protection, does not allow any turtle products traded.Even from abroad brings any turtle products are an offence.。

Sea turtles there is not currently enlisted in the list of animal protection in China.But as the international wildlife trade one of the Convention on the Member States, China always supports prohibit any turtle products traded.。

[edit] network of this paragraph the words。

Overseas officers.Formerly ” “ returned, and now use more is known as “ turtles homonym ”. This is known as the network.。

[edit the value of this paragraph] diet therapy。

Turtle species turtle meat.The distribution of the Yellow Sea turtles and South China Sea.Get the main extraction, after the flesh and blood standby.。

Sexual taste flat.Be delicious, moistening the cough.For ganshenyingxuxing, hot flashes, night sweats or dryness and Yin with lung, gasp cough short gas, etc.Can be cooking or fried soup.。

臭氧层 英文

one hundred and fifty-four centimeters（154 cm）

one hundred and fifty-seven centimeters（157 cm）

one hundred and eighty-three centimeters（183 cm）

one hundred and forty-four centimeters（144 cm）

one hundred and ninety-two centimeters（192 cm）

one hundred and thirty-six centimeters（136 cm）

one hundred and twenty-one centimeters（121 cm）

one hundred and eighteen centimeters（118 cm）

上20的非整数英语数字，中间要加连词符“-”。学好英语贵在“认真”！

大堡礁（Great Barrier Reef Queensland, Australia）英文介绍

The high altitude in 14-25 kilometres of distance earth surface, has formed the ozonosphere , this ozonosphere surrounding in the earth outer-ring space because of accepting the reason why the sun ultraviolet ray irradiates, exactly being an umbrella on which human being rely for existing. This it is most people to know that to the ozone all. Human being knows that ozone still is before more than 150 years really , Dr. brings forward bad smell coming into being in the solution and spark discharge in water and electricity by Germany chemist my deceased Beiyin first , identical with smell coming into being in the Nature lightning queen, my deceased Beiyin doctor thinks that whose smell is similar to naming the person OZEIN from this for the Greek OZEIN (intention "smelting bad"). (Ozone). Ozone in Nature, distributes mostly in spur floor 20 Km- - 50 Km atmosphere , we call it an ozonosphere. Ozone in ozonosphere is that the ultraviolet ray makes out mainly. Everybody knows , ultraviolet ray in sunray divides long wave and short wave two kinds, think that the oxygen molecule in atmosphere (contain 21%) accepts short wave when the ultraviolet ray irradiates, the oxygen molecule is able to break up able atom state. The oxygen atom block of wood stability pole is strong , the pole is easy and reaction happened in matter other. If (H2O) reaction generates water with hydrogen (H2),with carbon (C), reaction generates a carbon dioxide (C02). Have formed ozone right away when same , comparing with oxygen molecule (O2) reaction, (O3). Ozone forms the queen, because of whose specific gravity greater than oxygen, meeting gradually the bottom to the ozonosphere falls alight , (rise) in the process of build-down with the temperature change, the more the ozone block of wood stability tend towards the irradiation accepting the long wave ultraviolet ray again, restores obviously, once again for oxygen. The ozonosphere is the dynamic balance having kept this oxygen and ozone mutual change. Have the number ozone after all within so extensive area? Estimate to be smaller than atmosphere 1/100,000,p. If all ozone of middle concentrates atmosphere have three centimetres infertile layer together, only. Then, there exist woollen cloth in if earth surface have ozone? The answer is affirmative. The sun ultraviolet ray has almost 1% parts to may reach the floor presumedly. Especially in air pollution lighter forest, is intermountain , the ultraviolet ray of coast on every side is more, ozone that existence enriches comparatively. Besides, the thunder and lightning effect also produces ozone , scatters in the face of the earth. Exactly because of so-called, thunder storm afterwards, people feels the air briskness , people also is ready to go round outskirts forest , intermountain , coast to suck nature fresh air , the at the same time enjoying natural beautiful scenery, let the body and mind come to an once unhesitatingly "taking bath" , this are the ozone effect, therefore somebody says ozone is one kind of clean brisk gas. (Ozone has the extremely strong oxide , a little ozone may make person feel the spirit gets roused; But, too strong oxide sex also makes the person have the free radical killing and wounding the effect , the detailed idea). Atmosphere the ozonosphere has three effects mainly. One is 306.3 following mum ultraviolet rays protect the effect , ozonosphere wavelength in being able to absorb a sunlight , is all UV of part of UV B (wavelength 290 ~ 300 mums) sums C (wavelength mainly <290 mums =, protect on earth human being and animal and plant dispense with hurting meeting with the short wave ultraviolet ray. Radiation arrives at the floor only when long wave ultraviolet ray UV-A and a few medium wave ultraviolet ray UV-B can , the long wave ultraviolet ray is much slighter than medium wave ultraviolet ray than to hurting of living things cell. Therefore the ozonosphere can be existed just like a piece of space suit protects on earth living things multiply for. It's two is to heat an effect , ozone absorbs ultraviolet ray in sunlight and the person is changed for the thermal energy heats atmosphere, temperature structure has a peak because of this effect atmosphere in altitude 50 kms retinue , the earth warms up a tier there being existing a litre in 15 ~ 50 kms in the sky. Be exactly that ozone existence having stratosphere just now because of existence. , because but the celestial body outside the earth ozone and oxygen doing not existing therefore stratosphere doing not existing also right away. The atmosphere temperature structure has important effect to the atmosphere circulation , the altitude also coming from ozone distributes this one phenomenon origin. It's three is the greenhouse gas effect, before troposphere upper part and the stratosphere bottom, be this one altitude very low in the air temperature, the ozone effect same very important. If this one altitude ozone falls off, driving force that can produce messenger surface air temperature go down. Therefore, ozone altitude distribution and change are extremely important. Ozone is a colourless gas , has peculiar bad smell, need "ozone" because of it. That the charged particle flying out from the sun enters atmospheric layer, makes oxygen molecule nuclear fission become the oxygen atom , the part oxygen atom and the oxygen molecule combine but again becoming the ozone molecule. Atmosphere from floor 15 ~ 50,000 rice altitudes stratosphere, has concentrated on earth about 90%'s ozone , this has been an "ozonosphere".在距离地球表面14-25公里的高空 ，因受太阳紫外线照射的缘故，形成了包围在地球外围空间的臭氧层，这臭氧层正是人类赖以生存的保护伞。这就是大多数人对臭氧的全部认识。人类真正认识臭氧还是在150多年以前，由德国化学家先贝因（Schanbein）博士首次提出在水电解及火花放电中产生的臭味，同在自然界闪电后产生的气味相同，先贝因博士认为其气味类似于希腊文的OZEIN（意为“难闻”），由此将其命名为OZEIN.（臭氧）。

自然界中的臭氧，大多分布在距地面20Km--50Km的大气中，我们称之为臭氧层。臭氧层中的臭氧主要是紫外线制造出来的。大家知道，太阳光线中的紫外线分为长波和短波两种，当大气中（含有21%）的氧气分子受到短波紫外线照射时，氧分子会分解成原子状态。氧原子的不稳定性极强，极易与其他物质发生反应。如与氢（H2）反应生成水（H2O)，与碳（C）反应生成二氧化碳（C02）。同样的，与氧分子（O2）反应时，就形成了臭氧（O3）。臭氧形成后，由于其比重大于氧气，会逐渐的向臭氧层的底层降落，在降落过程中随着温度的变化（上升），臭氧不稳定性愈趋明显，再受到长波紫外线的照射，再度还原为氧。臭氧层就是保持了这种氧气与臭氧相互转换的动态平衡。

在这么广大的区域内到底有多少臭氧呢？估计小于大气的十万分之一。如果把大气中所有的臭氧集中在一起，仅仅有三公分薄的一层。那么，地球表面是否有臭氧存在呢？回答是肯定的。太阳的紫外线大概有近1%部分可达地面。尤其是在大气污染较轻的森林、山间、海岸周围的紫外线较多，存在比较丰富的臭氧。

此外，雷电作用也产生臭氧，分布于地球的表面。正因为如此，雷雨过后，人们感到空气的清爽，人们也愿意到郊外的森林、山间、海岸去吮吸大自然清新的空气，享受自然美景的同时，让身心来一次爽爽快快的“洗浴”，这就是臭氧的功效，所以有人说，臭氧是一种干净清爽的气体。（臭氧有极强的氧化性，少量的臭氧会使人感到精神振奋；但过强的氧化性也使其具有杀伤作用，详见自由基）。

大气臭氧层主要有三个作用。其一为保护作用，臭氧层能够吸收太阳光中的波长306.3μm以 下的紫外线，主要是一部分UV—B(波长290～300μm)和全部的UV—C(波长＜290μm＝，保护地球上的人类和动植物免遭短波紫外线的伤害。只有长波紫外线UV-A和少量的中波紫外线UV-B能够辐射到地面，长波紫外线对生物细胞的 伤害要比中波紫外线轻微得多。所以臭氧层犹如一件宇宙服保护地球上的生物得以生存繁衍 。其二为加热作用，臭氧吸收太阳光中的紫外线并将其转换为热能加热大气，由于这种作用 大气温度结构在高度50km左右有一个峰，地球上空15～50km存在着升温层。正是由于存在着 臭氧才有平流层的存在。而地球以外的星球因不存在臭氧和氧气，所以也就不存在平流层。 大气的温度结构对于大气的循环具有重要的影响，这一现象的起因也来自臭氧的高度分布。其三为 温室气体的作用，在对流层上部和平流层底部，即在气温很 低的这一高度，臭氧的作用同样非常重要。如果这一高度的臭氧减少，则会产生使地面气温 下降的动力。因此，臭氧的高度分布及变化是极其重要的。

臭氧是无色气体，有特殊臭味，因此而得名“臭氧”。由太阳飞出的带电粒子进入大气层，使氧分子裂变成氧原子，而部分氧原子与氧分子重新结合成臭氧分子。距地面15～50千米高度的大气平流层，集中了地球上约90％的臭氧，这就是“臭氧层”。

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