气干密度

air-dry density的用法和样例：

例句

Comparing with the dry density, influence of the saturation degree on gas permeability of shallow gassy sand is more significant.饱和度的变化相对于干密度对储气砂土的渗气性影响更为显著。

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决胜四级听力必备

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我们再来给大家介绍两个以dry这个字为主的习惯用语。第一个是：High and dry. High就是高，dry 就是干。要是一个人处于high and dry的局面，那他就是面临难以

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报告指出北京雾霾毒性已经有所下降

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