n. 真空

vaccum的用法和样例：

例句

用作名词(n.)

She has got a vaccum cleaner,but doesn't know what to do with it.她有一架真空吸尘器，却不知道怎样利用。
A new disc clicker is designed to repair the crutch of the vaccum electric stove used for synthetic diamond catalysts.为解决生产触媒用的真空电炉拐臂的修复而设计了花盘夹具，解决了修复电炉拐臂的问题，还可用来加工其它形状复杂的类似零件。

VOA标准英语2011--Millions More Children to Receive Vaccin

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VOA标准英语2011年(九月)

2006年VOA标准英语-President Bush Heading Texas for Working Vacati

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2006年VOA标准英语（十二月）

2007年VOA标准英语-Drug Manufacturer Says Increased Bird Flu Vacci

By Martin Secrest Washington, D.C. 18 April 2007 There may have been advances in the development of a vaccine to protect people against the H5N1 avian influenza virus, or bird flu. Researchers say it could be possible to substantially increase global

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VOA标准英语2010年-More Women Decline Cervical Cancer Vac

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VOA标准英语2011--US Scientists Expand Scope of HIV Vaccin

US Scientists Expand Scope of HIV Vaccine Study The worlds largest ongoing HIV vaccine study has been expanded to consider multiple ways a vaccine might boost immune response to the AIDS virus. The U.S. Institute of Allergy and Infectious Diseases (N

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VOA标准英语2011年(八月)

2006年VOA标准英语-French Researchers Develop Bird Flu Vaccin

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2006年VOA标准英语（五月）

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Have you ever said you would do something but then never really followed through? Perhaps you were talking about losing a few pounds, quit smoking or find a better job. Sometimes you dont finish or even get started because you dont know exactly what

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学英语单词

a child of nature

a run for one's money

aeration equipment

air and vacuum valve

aluwinaut

atmosphere-purifying equipment

cantilever jack-up drilling platform