过度放牧英语

The reasons for their species Special species and genetic failure, often leading to endangered species and even the underlying causes of extinction. Certain types of wild animals in the long-term evolution, adapted to a particular habitat and have had a special habits (including diet) to make it difficult to adapt to changes in the environment or other environmental and eventually end up "does not have been Out of "ending. Such as the giant panda into a special bamboo mainly for food, lose their existing habitat or a large area of bamboo flowering dead, no giant edible bamboo, a large number of inevitable death, appeared to survive the crisis. Some of the wildlife in the long-term evolution, for various reasons have been viability receded and the heritability of the threat of a recession, leading to its population and tend to be difficult to restore endangered 2), habitat destruction and loss Human deforestation for economic development, Wu Wai Wai Hai farmland, overgrazing, and so on, as a direct result of the loss of wildlife habitat, and indirectly led to the Endangered Species of Wild Animals. Forests and grasslands are wild animals, especially mammals, birds, insects, reptiles, as well as one of the most important habitats. Deforestation and land reclamation, followed by overgrazing and grassland, wild animals accounted for only inherent in their homes, wild animals will be divided into many small island-like stocks, making their survival of the race was very Great. � 4), environmental pollution Of this century, due to the pesticide, poison, chemical fertilizers, coal, oil, widely used to produce a large number of industrial "three wastes" and toxic substances, and serious pollution of the atmosphere, soil and water, wildlife damage to health, the growing low fecundity, Many rivers and lakes are no longer suitable for aquatic wildlife to survive and multiply. Some higher niche in the food chain because of wild animals also have been implicated in varying degrees.

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沙漠化的原因 causes of desertification沙漠化通常是由于人类对环境的破坏而造成的，其中包括：过度放牧，过度耕植，过度樵采，不合理利用水资源以及工商业发展中对环境的破坏。Desertification is usually the result of destruction to the environment by human beings, including excessive grazing, cultivating,and cutting, as well as irrational use in water resource and the destruction while developing industry and commerce除人为原因，自然原因也对沙漠化起到了推动作用——气候异常，风导致的沙丘移动等。Except the factors created by men, innormal climat,the natural factor, has motivated the desertification because the wind makes the dune move and so on而要治理沙漠化，就要对这些问题一一的加以处理。And to control the desertification, all these problems shold be solved one by one

Causes of DesertificationDesertification is usually caused by human's destruction to the environment which includes:overgrazing,excessive lumbering,unreasonable use of water resources and the development of commerce and industrial. Except for human's activities,natural factors also have a pushing effect on desertification----climatic anomaly,travelling dune caused by wind,ect.However,to control desertification,we need to solve those problems step by step

北京奥运项目按英文顺序排列 Aquatics - Diving 游泳 －跳水Aquatics - Swimming 游泳－ 游泳Aquatics - Synchronized Swimming 游泳 － 花样游泳Aquatics - Water Polo 游泳 －水球Archery 射箭 Athletics 田径Badminton 羽毛球Baseball 棒球Basketball 篮球Boxing 拳击Canoe/Kayak - Flatwater 皮划艇 － 静水Canoe/Kayak - Slalom 皮划艇－ 激流Cycling - Road 自行车－ 公路Cycling - Mountain Bike 自行车 －山地Cycling - Track 自行车－ 场地Cycling - BMX 自行车－ 小轮车Equestrian - Dressage 马术 - 舞步Equestrian - Jumping 马术 - 障碍Equestrian - Eventing 马术 - 三项赛Fencing 击剑Football 足球Gymnastics - Artistic 体操 - 竞技体操Gymnastics - Rhythmic 体操 - 艺术体操Gymnastics - Trampoline 体操 - 蹦床Handball 手球Hockey 曲棍球Judo 柔道Modern Pentathlon 现代五项Rowing 赛艇 Sailing 帆船Shooting 射击Softball 垒球Table Tennis 乒乓球Taekwondo 跆拳道Tennis 网球Triathlon 铁人三项Volleyball - Indoor 排球 - 室内Volleyball - Beach 沙滩排球Weightlifting 举重Wrestling - Freestyle 摔跤 - 自由式Wrestling - Greco Roman 摔跤 - 古典式

2008，一个再普通不过的数字，但是，一提到它，会让多少中国人热血沸腾！一个数字怎么会有如此大的魔力？答案是简单而神圣的，在这一年里，北京将举办第29届奥林匹克运动会，那时，世界的目光将齐聚北京，而北京，也将以主人的身份，展现她最美丽的风采！2008, but a more general figures, however, a reference to it, how much will the Chinese people blood boiling! There will be a figure how such a large magic » The answer is simple and sacred, in the year, Beijing will hold the 29th session of the Olympic Games, then, the world's attention will gather in Beijing, and Beijing, will also be the identity of the owner, show her the most beautiful charisma! 2008，北京的奥运将是一届绿色的奥运、科技的奥运、人文的奥运。其中，"绿色奥运"是三个最重要的理念之一。这充分表现出我们要办好一届环保奥运的决心和信心！然而，要实现这一目标，我们要走的路还十分艰辛。 2008, the Beijing Olympic Games will be a green Olympics, the Olympic technology, humanities Olympics. Among them, "Green Olympics" are the three most important concepts of. This has fully demonstrated we want to host the Olympic Games of the environmental determination and confidence! However, to achieve this goal, we have a very difficult road still. 我想，作为一名中学生，我们更有责任，也更有义务积极地投入到环保行动中。我们的一举手，一投足，都会给市容环境带来影响。因此，我们要从我做起，从身边做起，从小事做起，努力为北京争光添彩。那么，怎样才能从小事做起呢？ think that as a secondary school students , we have more responsibility and more active duty into environmental action. We have a show of hands, a Touzu, will be brought to the city environmental impact. Therefore, we must start with me, starting from the side, from small start, and add luster to win glory for Beijing. So, how can we start from the trivial?其实生活中我们能做得也有很多。近年来沙尘暴肆虐北京，大家一定都有体会。过度放牧和采伐森林使土地沙漠化，虽然我们无力使所有退化土地重新成为绿洲，但至少我们可以在我们的学校植树，在我们的小区植树，如果人人都能行动起来，北京将成为绿色的北京，2008将成为绿色的奥运。 In fact, we can do in life there are many. Beijing dust storms wreaked havoc in recent years, we have some experience. Overgrazing and deforestation of land desertification, although all of our inability to again become the oasis of degraded land, but at least we can in our school tree planting, planting trees in our area, if everyone can take action, Beijing will be green The Beijing 2008 Olympic Games will become green.看看哪些你重点需要加以取舍

奥运会 Olympic Games 奥运会选拔赛 Olympic Trial 国际奥委会 International Olympic Committee 奥运会圣歌 Olympic Anthem 奥运会主题歌 Olympic Theme Song 奥运火炬 Olympic Torch 奥运会代表团 Olympic Delegation 奥运村 Olympic Village 组委会 Organization Committee 开幕式 Opening Ceremony 闭幕式 Closing Ceremony 吉祥物 Mascot 颁奖台 Podiumacrobatic gymnastics---技巧运动athletics/track & field---田径beach---海滩boat race---赛艇bobsleigh, bobsled---雪橇boxing---拳击canoe slalom---激流划船canoe---赛艇chess---象棋cricket---板球cycling---自行车diving---跳水downhill race---速降滑雪赛,滑降dragon-boat racing---赛龙船dressage---盛装舞步equestrian---骑马fencing---击剑figure skating---花样滑冰football(英语)/soccer(美语)---足球freestyle----自由式gliding; sailplaning---滑翔运动golf----高尔夫球Greece-Roman wrestling----古典式摔跤gymnastic apparatus----体操器械gymnastics----体操handball-----手球hockey----曲棍球hold, lock-----揪钮horizontal bar-----单杠hurdles; hurdle race----跨栏比赛huttlecock kicking---踢毽子ice skating---滑冰indoor---室内item Archery---箭术judo---柔道jumping----障碍kayak----皮划艇mat exercises---垫上运动modern pentathlon---现代五项运动mountain bike---山地车parallel bars---双杠polo---马球relative work---造型跳伞relay race; relay---接力rings----吊环roller skating----滑旱冰rowing-----划船rugby---橄榄球sailing--帆船shooting---射击side horse, pommelled horse---鞍马ski jump---跳高滑雪ski jumping competition---跳高滑雪比赛ski---滑雪板skiing---滑雪slalom---障碍滑雪softball---垒球surfing---冲浪swimming----游泳table tennis---乒乓球taekwondo---跆拳道tennis----网球toxophily---射箭track---赛道trampoline---蹦床trapeze---秋千triathlon---铁人三项tug-of-war---拔河volleyball---排球badminton---羽毛球baseball---棒球basketball---篮球walking; walking race---竞走wall bars---肋木water polo----水球weightlifting ---举重weights ---重量级winter sports -----冬季运动wrestling --- 摔交yacht --- 游艇Men's 10m Platform 男子10米跳台Women's Taekwondo Over 67kg 女子67公斤级以上跆拳道Women's Athletics 20km Walk 女子20公里竟走Men's Diving Synchronized 3m Springboard 男子3米跳板Women's Diving 3m Springboard 女子3米跳板Women's Diving Synchronized 10m Platform 女子10米跳台Men's Wrestling Greco-Roman 58kg 男子58公斤古典摔交Men's Diving 3m Springboard 男子3米跳板Men's Artistic Gymnastics Parallel Bars 竞技体操男子双杠Women's Artistic Gymnastics Beam 竞技体操女子自由体操Men's Table Tennis Singles 男子乒乓单打Women's Diving 10m Platform 女子10米跳台Women's Artistic Gymnastics Uneven Bars 竞技体操女子跳马Women's Table Tennis Singles 女子乒乓单打Men's Badminton Singles 男子羽毛球单打Women's Badminton Doubles 女子羽毛球双打Men's Diving Synchronized 10m Platform 跳水男子10米跳台Women's Diving Synchronized 3m Springboard 跳水女子3米跳板Men's Table Tennis Doubles 男子乒乓球双打Women's Badminton Singles 女子羽毛球单打Men's Fencing Team Foil 击剑男子团体花剑Women's Judo Heavyweight +78kg 柔道女子重量级78公斤Men's Shooting 10m Running Target 射击男子10米移动靶Women's Shooting 25m Pistol 射击女子25米运动手枪Women's Table Tennis Doubles 女子乒乓球双打Men's Weightlifting 77kg 举重男子77公斤级抓举Women's Weightlifting 75+ kg 举重女子75公斤以上级抓举Mixed Badminton Doubles 羽毛球男子双打Women's Artistic Gymnastics All-Around Finals 竞技体操女子个人全能决赛Women's Judo Half-Heavywt 78kg 女子次重量级78公斤级柔道Men's Artistic Gymnastics All-Around Finals 竞技体操男子个人全能Women's Fencing Team Epee 击剑女子团体重剑Women's Artistic Gymnastics Team Finals 竞技体操女子团体Women's Judo Half-Middlewt 63kg 女子次中量级63公斤级柔道Women's Weightlifting 63kg 女子63公斤级挺举举重Women's Weightlifting 69kg 女子69公斤级抓举举重Men's Artistic Gymnastics Team Finals 男子团体竞技体操Men's Shooting 10m Air Rifle 射击男子10米气步枪Women's Shooting Trap 射击女子多向飞碟Women's Weightlifting 53kg 举重女子53公斤级抓举Women's Judo Half-Lightwt 52kg 女子次轻量级52公斤柔道Women's Shooting 10m Air Pistol 女子10米汽枪Women's Cycling Track 500m Time Trial 运动场自行车赛女子500米计时赛Men's Shooting 10m Air Pistol 男子10米气手枪Women's Shooting 10m Air Rifle 女子10米气步枪Men's Weightlifting 56kg 男子56公斤级挺举