air sac

air sac

气囊
[地质]气孔

例句与用法：

One of the major aims of the air raid was the complete demolition of all means of communications by bombing.

这次空袭的一个主要目的，就是通过轰炸彻底摧毁敌人的通讯设施。

The children had to be got under the stairs whenever there was an air raid.

每当空袭就不得不把孩子们藏到楼梯底下。

Many civilians were killed in the air raid on London.

在伦敦遭空袭时，有很多老百姓遇难。

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ph.

【解】肺泡; 气囊