covering or affecting the whole world 1、The introduction of foreign species is a global phenomenon. 引进外来物种是一种全球性的现象。
2、So from the global perspective, it is very important. 所以从全局的角度来看，这是很重要的。
3、But since today's biggest challenges are global, they expect. above all that we will work together at the global level, as the United Nations.
但是,我们今天遇到的最大挑战往往是全球性的,所以他们期望我们能以联合国的形式在全球的范围内一起工作。
Violent adj. 猛烈的；激烈的；强暴的
acting with or marked by or resulting from great force or energy or emotional intensity 1、Violent crime is only one of the maladies afflicting modern society. 暴力犯罪仅仅是危害社会的弊病之一。
2、The universe is a place of violent deaths, but also violent births.
宇宙是一个各种星体猛烈消亡的场所,但同时也是各种星体猛烈爆发的场所。
3、The methods the United States employs are now violent, now non-violent, and this is the game it is playing in the Middle East.
美国采用的办法,有文的,也有武的,在中东就是这样。 In time 及时；终于
soon enough ；eventually 1、Firemen reached the house on fire in time. 消防队员及时赶到那幢失火的房子。
2、I intended to catch the early train, but I didn't get up in time. 我本来打算赶早班的火车，但是我起晚了。 3、National unity is essential in time of war. 举国团结在战时是非常重要的。 Carbon n. 碳
Carbon is a chemical element that diamonds and coal are made up of. 1、A price on carbon, he argues, would threaten it. 他认为，煤炭的价格会威胁到制造业。 2、She's a carbon copy of her sister. 她跟她姐姐一模一样。
3、A frequent worry about carbon taxes is that they will hurt business and the economy. 对碳排放征税人们常常担忧的是这将使商业和经济受到创伤。 Atmosphere n. 大气层；气氛
the mixture of gases that surrounds the earth ；the feeling or mood that you have in a particular place or situation 1、The atmosphere encompasses the earth. 大气层包围着地球。
2、The thin atmosphere means Mars gets very cold.
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大气层稀薄意味着火星十分寒冷。
3、The tight atmosphere in the room made me uneasy. 房间里的紧张气氛让我心神不宁。 Unlike prep. 不同，不像
different from 1、A person, unlike a machine, is not replaceable. 人和机器不同，是不可替代的。
2、He managed to finish the race, unlike more than half of the competitors. 他在比赛中坚持跑完了全程，不像大部分选手那样半途而废。 3、She's very unlike her mother;they're completely unlike. 她很不象她的母亲,她俩完全不一样。 Fundamental adj. 基本的；基础的
of or forming the basis or foundation of sth; essential 1、There are fundamental differences between your religious beliefs and mine. 你我的宗教信仰根本不同。
2、If you two are going to marry, I advise that you need to know the fundamentals of cooking.
如果你们要结婚的话，我建议你们了解烹调的基本知识。
3、A knowledge of economics is fundamental to any understanding of this problem. 经济知识对于理解这个问题是至关重要的。 Presence n. 出席；到场；存在
being present in a place 1、She was so quiet that her presence was hardly noticed. 她那么安静，几乎没有人注意到她在这里。
2、Should you smoke so much in the presence of ladies? 你难道应该在女士前抽这么多烟吗 ？
3、Your presence is requested at the shareholders' meeting. 敬请您出席股东会议. Harmful adj. 有害的
causing damage or injury to sb/sth, especially to a person's health or to the environment 1、Drunkenness is harmful to our health. 醉酒对我们的身体有害。
2、In public area, however, the \ harmful. 然而，在公共领域里，“零距离”是有害的。
3、He says good farming and science could probably breed out any diseases that may be harmful to humans.
他讲到，好的饲养条件和科学的饲养技术很可能使那些对人有害的疾病繁衍。 Acid n. 酸
a chemical substance that has a pH of less than 7. 32
1、I am doing an experiment of neutralizing acid. 我在做一个中和酸的实验。
2、Acids react with bases to form salts. 酸与碱反应生成盐。
3、Acid rain, meanwhile, reduces agricultural yields and eats away at buildings and infrastructure.
同时酸雨使农业产量减少并腐蚀建筑物和基础设施。 Chain n. 链子；连锁；锁链
a series of connected metal rings, used for pulling or fastening things. 1、The Government fear the strike may produce a chain reaction in other industries.政府害怕罢工可能在其他行业产生连锁反应。 2、He detached a link from a chain. 他从链子上拆下一个链环。
3、As China moves up the value chain, it will export cheaper products in new industries, such as cars.
随着中国在价值链上的攀升，将在新兴产业出口更便宜的产品，如汽车。 Reaction n. 反应；回应
what you do, say or think as a result of sth that has happened； 1、A reactor is a container for chemical reaction. 反应器是进行化学反应的容器。
2、Running away is our instinctive reaction when we meet danger. 遇到危险时，我们的本能反应就是跑开。 3、What was his reaction to the news? 他对这消息的反应如何? Multiply vi. & vt. 乘；增加
to increase greatly in number, or (in mathematics) to add a number to itself a particular number of times； 1、We must multiply our efforts to clear up the mystery. 我们必须加倍努力来澄清这一神秘的事件。 2、Four multiplied by seven is twenty-eight. 7乘4等于28。
3、Only action determines my value in the market place and to multiply my value I will multiply my actions.
只有行动才能决定我在商场上的价值。若要加倍我的价值,我必须加倍努力。 Oxygen n. 氧
a colourless gas that forms a large part of the air on Earth and which is needed by people, animals and plants to live； 1、Water contains hydrogen and oxygen. 水含有氢和氧。
2、Oxygen masks are used in aircraft only in emergencies.
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飞机上的氧气面具只用於紧急情况。
3、This is your seat area and shows the brace position, exits, lifejackets and oxygen. 这是您的座位区，演示防撞击姿势，出口，救生衣还有氧气设备。 Exist vi. 存在 ；生存
to be real; to be present in a place or situation； 1、That department has ceased to exist. 那部门已不复存在。
2、Man cannot exist without air. 没有空气人就不能生存。
3、The idea exists only in the minds of poets. 这种想法是诗人才有的. Give birth to 产生；分娩
bear 1、On October17, at9:25A. she gave birth to a beautiful baby girl. 10月17日上午9时25分，她生下一个漂亮的小女孩。
2、It is said that James Watt's observation of steam issuing from a kettle gave birth to the idea of the steam engine.
据说，詹姆斯瓦特对水壶蒸气的观察使他产生了发明蒸汽机的想法。
3、The state respects a woman's right to give birth and protects her health when giving birth.
国家尊重妇女的生育权,保护妇女的生育健康。 Thus adv. 因此；于是
in this way; like this;as a result of this; 1、It was already rather late, thus we decided to urge the customer. 已经相当晚了，所以我们决定催促客户。
2、Anne ought not to speak thus of her benefactor. 安不应该这样谈论她的恩人。
3、He forgot to turn on the radio and thus missed the program. 他忘了打开收音机，因此错过了那个节目。
4、Thus do the beavers, thus do the bees, thus do men. 海狸是这样做的,蜜蜂是这样做的,人也是这样做的。 Carbon dioxide 二氧化碳
the gas formed when carbon is burned, or when people or animals breathe out; 1、Soft drinks contain carbon dioxide. 软饮料中含有二氧化碳。
2、Carbon dioxide is inexplicably a mere trace gas when it should be the bulk of the air, as it is on other planets.
令人费解的是，二氧化碳理应像在其他行星那样成为大气的主要成分，却仅仅是一种示踪气体。
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3、At pressures and temperatures greater than the critical point, carbon dioxide exists only as a supercritical fluid.
在压力和温度大于其临界点时，二氧化碳只可能以超临界流体形式存在。 Prevent…from 阻止；制止
stop from; 1、Drinking tea helps prevent from getting agedness kind cataract . 饮茶可以预防老年性白内障。
2、University of Arizona Extension experts say covering plants and small trees with cloth or paper can help prevent from their frost damage.
亚利桑那州附属大学的专家称，用衣物或纸覆盖植物和小树，能帮助防止霜冻危害。 3、Not impede fair competition, prevent from over-concentration of domestic related products, and from exclusion or limitation of competition.
不得妨碍公平竞争，不得造成中国境内相关产品市场过度集中、排除或限制竞争。 Puzzle n. 谜；难题 vi & vt (使)迷惑；（使）为难
a situation which is difficult to understand ; to cause someone to feel confused and slightly worried because they cannot understand something; 1、A jigsaw puzzle is a picture which has been cut up into bits, and you must make the picture again.
拼板玩具是一个被分割成块的图,你必须再把这图拼起来。 2、She listened with a puzzled expression on her face. 她脸上带著困惑的表情在倾听。 3、Her reply puzzled me. 她的回答把我弄糊涂了。
4、He stood there watching with puzzled despair. 他束手无策地站在那儿看着。 Biology n. 生物学
the scientific study of the life and structure of plants and animals; 1、Her school report shows that she is weak at/in arithmetic and biology. 从她的学习成绩单可看出她算术和生物成绩差。
2、The biology paper (ie in an examination) was a real stinker. 生物试卷真难答。 3、He specializes biology. 他主修生物学。 Biologist n. 生物学家
a scientist who studies living things 1、This is that biologist having rescued her life. 这就是救了她生命的那个生物学家。
2、\ biologist,\\我想当一个优秀的生物学家,\凯瑟琳认真地说。 3、The biologist advanced a new theory of life.
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