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Lesson 38 Water and the traveller 水和旅行者 First listen and then answer the following question. 听录音，然后回答以下问题。 What does this text describe? Contamination of water supplies is usually due to poor sanitation close to wat
新概念英语第四册
英语文摘欣赏 Once there was a great Sufi saint. In his last days, someone asked him about his master. Saint said, Since you asked I will certainly tell you about three masters. 曾经有一位伟大的苏菲派（伊斯兰神秘主义派别的总
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The US Environmental Protection Agency lists stormwater as the primary cause of water pollution in the United States. Roads, shopping centers and housing developments are generally seen as enhancing a community's quality of life. But they can also di
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While one of the most pressing political and social issues facing the Arab world rarely makes headlines, it is an issue that some political analysts believe could lead to the next great confrontation in the region. Rapidly expanding Arab populations
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All animals communicate. 所有动物都会相互交流。 Crabs wave their claws at each other to signal that they're healthy and ready to mate. 螃蟹相互挥舞钳子表明它们健康并准备交配。 Cuttlefish use pigmented skin cells called
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BEIJING, Feb. 2 (Xinhuanet) -- The source of cadmium contamination in the Liujiang River had been blocked and tap water in Liuzhou is safe to drink, said environmental officials of the Guangxi Zhuang autonomous region on Wednesday. Tap water from Liu
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