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friction［‘frikʃn］n. 摩擦；摩擦力；矛盾
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例句 1. The forward movement of a small object will be reduced by the air friction. 由于空气摩擦的作用，小物体的向前运动会被减缓。
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2. Sometimes I think the friction between cultures has enriched the world and made it more beautiful. 有时候，我觉得不同文化之间的摩擦丰富了这个世界，也让它变得更加美丽。
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同义 clash, conflict（n. 冲突）
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要点 friction虽然最常用的含义是表示“摩擦力”，但其实这个词也可以表示“冲突”，比如：the friction between（…与…之间的冲突）。
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function［‘fʌŋkʃn］n. 机能；作用；函数 v. 运行；起作用
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例句 1. It just doesn’t matter, as long as they perform their function without any mistakes. 这并不重要，只要它们能不出差错地发挥它们的作用。
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2. Function of the products is the most important thing for us, because if something is beautiful but it is not able to be used, it is only a decoration. 对我们来说，产品功能是最重要的事情，因为如果一件物品很美观却没有用处，那么它只能是一个装饰品。
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3. In addition to the benefits of playing on the physical systems of humans for example toning of the various organ systems to their best levels of functioning, doing exercise is also good for the mental health of the individual. 除了在人类的身体系统上发挥作用的益处，比如调节多种器官系统使其达到最佳功能水平以外，锻炼对个人的身心健康也十分有益。
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派生 multifunctional（a. 多功能的）；malfunction（n. 故障）
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geology［ʤi’ɑ
:ləʤi］n. 地质学；地质概况
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例句 1. The famous geologist had made great achievements in geology. 这位著名地理学家在地理学方面获得了很大的成就。
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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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