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英汉解释

n. 通风设备；换气扇

同义词

n.

breathing apparatus，breathing device，breathing machine

参考例句

1. The working principle of the

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is presented and increases the method of the

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life.

介绍了煤矿通风机的工作原理及提高使用通风机寿命的方法。

2. It also makes overall appraisement to properties of main

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, finds the main existing problems, and put forward the pertinent solution.

对该矿井的主通风机性能进行了全面评价，得出了其存在的主要问题，提出了解决方案。

3. Result The incidence of the VAP had close relation with the patient′s age, aeration time, virulence operation and the disinfection management of the

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duct.

结果呼吸机相关性肺炎的发生与病人年龄、通气时间、侵入性操作以及呼吸机管道的消毒管理有着密切的关系。

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obligatory

英汉解释

adj. 义务的；必须的；义不容辞的

反义词

a.

optional