[化] 前级泵

backing pump的用法和样例：

例句

The pump exhaust should lead to the open air or a fume hood.抽气泵的排气管应该导向室外空旷处或导向一座通风橱。

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英语每日一词

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跟艾米莉一起学口语

AP 2012-02-06

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美联社新闻一分钟2012(二月)

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By Melinda Smith Washington 28 March 2008 Last month we told you about a young woman in the United States who got an experimental heart pump to help keep her alive. VOA's Melinda Smith has an update on her remarkable story.

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VOA标准英语2010年(一月)

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VOA标准英语2010年(四)月

英文短篇故事（纽约）169 The Bicycle Pump at K-Mart

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单词超市第11期 pump

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The blue bike was sitting in Owens living room. It had no kickstand, so he had wedged the front tire in between two bookshelves so that the bike would stand upright. Both tires were flat. Dust covered the bike. However, no household spiders had set u

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A debate over the correct way to wear earrings is raging over Facebook after a man posted that you should remove the plastic backing from ear studs before they are worn. Joseph Ayoub wrote: 'After my 19 years of living, I have now realized you're sup

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学个词 12:pump

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学英语单词

alleged evidence

bodywrap

broom cypress

building supply store

camisated

camoca

capillary membrane module