[化] 氯化花青素; 氯化矢车菌素

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Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文，请发贴到听力原文收集区，您将会获得10到30积分的奖励! Thank you！

发表于:2018-12-04 / 阅读(91) / 评论(0)

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一起闲话英语-English Chitchat

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[单词解析速记].JV542.(Penchant.and.Intrepid)

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名人轶事:IdaTarbell,1857-1944: She Used Her Reporting Ski

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DAVID GREENE, HOST: Families across the United States are fighting with the federal government over a deadly chemical. Dozens of people have died from inhaling methylene chloride. This is an ingredient in common paint removers. NPR's Rebecca Hersher

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科学美国人60秒 SSS 2016-1-1

Every winter some twenty million tons of salt are dumped on America's road.That sodium chloride melts the ice, so it prevents its formatin, helping to prevent accidents. But road salt has its downside. This is not very economical because salt is main

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the Perseid meteor shower

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趣味英语

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地道美语播客

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BEIJING, Jan. 3 (Xinhua) -- A policy that requires users to use their real names when registering for Internet access has triggered heated discussion, with some for and some against it. On Dec. 28, China's top legislature passed rules on protecting o

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英语听书《海底两万里》第170期第12章一切都用电(3)

First off, I'll mention that at the bottom of the sea there exist veins of zinc, iron, silver, and gold whose mining would quite certainly be feasible. 首先，我对您说，海底有锌、铁、银、金等矿藏，开发并不是不可能的事。

发表于:2019-02-25 / 阅读(163) / 评论(0)

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