[电] 完全真空

perfect vacuum的用法和样例：

例句

The food is kept in the absolute vacuum.这食物保存在绝对真空中。
In contrast to the mechanism of conduction and convection,radiation may take place in a perfect vacuum.与传导和对流的原理不同，辐射可在完全真空中进行。

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发表于:2018-11-29 / 阅读(219) / 评论(0)

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aprifrontalia mascula