[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)

VOA常速英语2008年-Heart Pump Patient No Longer Needs New Heart

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2008年（三月）

VOA标准英语2010年-Heart Pump Could Save Possibly Million

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VOA标准英语2010年(一月)

VOA标准英语2012--Life-saving Heart Pump Developed for Children

Life-saving Heart Pump Developed for Children Sixteen-year-old Marco Murguia can now play basketball and live a normal life. But in early 2007, when he was ten, his mother, Connie Murguia, noticed he was acting sluggish and took him to Texas Children

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VOA标准英语2012年(八月)

VOA标准英语2010-Some Western Workhorses Don't Eat Hay

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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

He was going to ride his bike down to South Ferry. He squeezed the tires. They were soft. They needed air. I should buy a pump one of these days, he thought. He rode his bike to K-Mart on 34th Street. He walked the bike inside the store. He went to t

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英文短篇故事（纽约）

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VOA标准英语2010年(四)月

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VOA2004（上）--各类新闻

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实用英语

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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365个英语简短小故事

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英语新闻

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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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阅读空间

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舞曲狂欢

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Sugababes - Girls Here come the girls Mmm, oh yeah (BACKING TRACK: ERNIE K. DOE Whoa, water, I don't need no lemonade) Here come the girls! (Girls, Girls, Girls, Girls) Here come the girls! (Girls, Girls, Girls, Girls) Here come the girls! (Girls, Gi

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好听的英文歌曲

学个词 12:pump

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学个词

Mexican IMF Contender Visits Brazil

The head of Mexico's central bank says Latin American countries deserve greater representation at the International Monetary Fund. Agustin Carstens made the comments Wednesday in Brazil, where he is seeking support for his bid to become the next mana

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学英语单词

-tempered

abandoned blasting

absolute viscometer

active preventive maintenance time

adolescent goiter

AF-KLM

aircraft sprayer

al lagowa (el lagowa)

an aerial line

anemone fish

as early as possible