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例句 1. Everybody should bear this fact in mind: the removal of one plant from an ecosystem can cause many unforeseen changes, and sometimes may damage it irreversibly. 每个人都应该把这一事实牢记于心：从某个生态系统中除去某种植物会造成许多无法预见的改变，有时会对生态系统造成不可逆转的破坏。
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2. The lecturer objects to the measure of using an infectious virus for a virus intended to eliminate the whole cane toad population of this country could be transmitted to other places where cane toads are an essential part of the ecosystem. 讲师反对使用传染性病毒的措施，因为这种将会消灭这个国家所有蔗蟾蜍的病毒会被传递到其他地方，而在那些地方，蔗蟾蜍是其生态系统中的一个重要部分。
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element［‘elimənt］n. 元素，要素
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例句 1. He may be a master of painting light and shadow, but in this painting these elements do not go with each other. 他也许是绘画光与影的大师，然而在这幅作品中，这些元素相互搭配得并不和谐。
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2. On a larger scale, car production is possibly the most significant element of this country’s industry. 从更大程度上来说，汽车生产可能是这个国家产工业中最重要的元素。
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同义 component（n. 成分；组件）
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要点 element和component都有“元素，成分”的含义，但两者最大的区别在于element指“事物的组成部分”，主要是抽象的事物，如：Health is an important element of our life. 而component除了可以表示抽象事物的组成部分以外，多指“机器的组件”，比如：It is a key component of this machine.
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emission［i’miʃn］n. 散发（物）；发射；排放
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搭配 zero-emission 零排放，无污染
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例句 Although many cities require installing catalytic converters and other controls on motor vehicles to restrict the emission of pollutants, the great number of many thousands of motor vehicles awaiting the installation is also a problem to the government. 尽管许多城市要求在机动车上安装催化转换器以及其他控制装置以减少尾气排放，但等待安装的机动车有数千辆，这一庞大的数目仍然是政府的一个难题。
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enrich［in’riʧ］v. 使充实；使肥沃；使富裕
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例句 1. The decomposition of wood and other plants is a natural process that enriches the soil and makes it more suitable for the future growth of trees. 木材和其他植物的腐烂是一个自然的过程，这个过程会使土壤变得更加肥沃，并且更适合今后树木的种植。
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2. By changing life style constantly, people can enrich their knowledge and broaden their horizon. 通过不断地改变生活方式，人们可以扩充知识并开阔眼界。
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3. Some older people may like classic movies and books that can remind them of the past, and they think these movies and books can enrich people’s spiritual life obviously. 许多年长的人喜欢那些能让他们想起旧时光的经典电影和图书，而且他们认为这些电影和书显然能够充实人们的精神生活。
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同义 fertilize（v. 使肥沃）
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evergreen［‘evərgri
:n］a. 常绿的 n. 常绿树；常绿植物
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搭配 evergreen trees 常青树
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例句 In the 1950s, a kind of evergreen tree which was once very common in this area started to die out. 在20世纪50年代，一种在这个地区曾经十分常见的常青树开始灭绝。
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evolve［i’vɑ
:lv］v. 发展；（使）进化；使逐渐形成
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例句 1. Through their hard work and continuous endeavor, the world evolves more rapidly than ever. 由于他们的辛勤工作和不断的努力，世界正以比以往更快的速度发展。
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2. Some scientists suppose that birds are evolved from dinosaurs. 一些科学家假设鸟类是由恐龙进化而来的。
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3. The techniques of pottery manufacture had evolved to its peak in ancient times. 早在古代，制陶术就已经发展到了极致。
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fluid［‘flu
:id］n. 液体，流体 a. 流动的，液体的
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搭配 fluid dynamics 流体力学
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例句 There’s a kind of fluid with a strong smell on the floor. 地板上有一种气味很重的液体。
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