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

Millions More Children to Receive Vaccines More than one million children die each year from severe diarrhea and pneumococcal disease. Today (Tuesday), the GAVI Alliance announced an expanded campaign against the two leading killers of children world

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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

By Paula Wolfson Washington 25 December 2006 U.S. President George Bush heads to his Texas ranch Tuesday for a week-long holiday break. But as VOA's Paula Wolfson reports from Washington, it will be very much a working vacation. President Bush is ex

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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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2007年VOA标准英语（四月）

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

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VOA标准英语2010年(十一)月

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

By Jessica Berman Washington 11 May 2006 French researchers at the Sanofi Pasteur Institute say they have developed a bird flu vaccine that, so far, appears to be safe and effective in humans. But obs

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2006年VOA标准英语（五月）

Whatever Your Circumstance

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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