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2. Everybody in our geology class are looking forward to this trip. 我们地理课上的每个人都非常期盼这次旅行。
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gravity［‘grævəti］n. 重力；严重性；严肃
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例句 1. Much of the research done in space, for example under the circumstance of zero gravity, is making a difference in relevant fields. 很多在宇宙空间中所作的研究，比如那些在零重力影响下进行的研究，都在相应的领域产生了影响。
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2. There is more gravity on the Earth than on the Moon. 地球上的重力比月球上的大。
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gulf［gʌlf］n. 海湾；分歧；鸿沟
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例句 1. From the news, we can learn a lot about what happened during the Gulf War. 通过新闻，我们可以知道在海湾战争期间都发生了什么事情。
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2. According to the geologists, 90% of the coast of the Gulf of Mexico is eroded. 据地质学家们表示，墨西哥湾90%的海岸都受到了侵蚀。
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同义 bay（n. 海湾）；divergence（n. 分歧）
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habitat［‘hæbitæt］n. 自然环境；栖息地
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搭配 natural habitat 自然栖息地
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例句 1. The main habitat of the various animals, the forest, has been destroyed by human behavior. 森林这一各类动物的主要栖息地已经由于人类行为而遭到破坏。
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2. It’s true that the development of urban has been bad for some species of birds, but the development also provides better and larger habitats for other types, that’s why many city dwellers often complain about increased bird populations. 诚然，城市的发展会对某些种类的鸟不利，但同时城市发展也会为其他种类的鸟提供更好更大的栖息地，这就是为什么许多城市居民总是抱怨鸟类的数量增多。
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3. One reason for the decline of the number of amphibians is that their habitats have been destroyed. 两栖动物数目减少的一个原因是其栖息地遭到了破坏。
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hacker［‘hækər］n. 电脑黑客
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例句 They have to recognize the importance of protecting their articles and data from malicious hackers. 他们必须认识到保护文章和数据不被恶意黑客攻击的重要性。
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immune［i’mju
:n］a. 免疫的；不受影响的；免除的
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搭配 immune system 免疫系统
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例句 1. Moreover, air pollution may result in health problems particularly for children and the elderly whose immune systems are weaker. 此外，空气污染还可能导致健康问题，尤其是对于那些免疫系统较弱的儿童和老年人。
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2. However, Albert Einstein, the greatest physicist who created the theory of relativity, was immune to wealth. 然而，提出了相对论的伟大物理学家艾伯特•爱因斯坦却没有获得财富。
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3. This area was immune to drought. 这个地区未受旱灾影响。
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要点 immune除了在医学方面可以表示“免疫的”以外，还有“不受某种事物的影响”的含义，比如：It is immune to…这个句型就可以表示“…不受…的影响”。
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infect［in’fekt］v. 传染，感染；影响
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例句 Once the animals infected by the virus reach the country, the virus will attack the native species and devastate the whole population. 一旦被病毒感染的动物到达这个国家，这种病毒就会袭击当地的物种并毁灭整个种群。
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infection［in’fekʃn］n. 传染，感染；传染病
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搭配 respiratory infection 呼吸道感染
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