The density of air varies directly as pressure, with temperature being constant.
温度不变，空气的密度和压力成正比。
Thee density of air varies directly as pressure, with temperature being constant.
若温度不变，则空气密度的变化与压力乘正比。
The density of the air varies directly as pressure with temperature constant.
当温度不变时空气的密度同压力成正比。
The radiation effect of high density polyethylene films in the air was studied.
本文研究了空气中高密度聚乙烯薄膜的辐射效应。
The radiation effect of high density polyethylene films in the air was studied.
本文研究了空气中高密度聚乙烯薄膜的辐射效应。
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