干燥空气是多种气体的混合，按体积计，大部分是氮气。
Dry air is a mixture of gases, most of which is nitrogen by volume.
干燥空气是多种气体的混合物，按体积计，大部分是氮气。
Dry air is a mixture of gasses, most of which is nitrogen by volume.
所有液货舱大气是否维持正压，且其含氧量以体积计低于8% ？
Are all cargo tank atmospheres at positive pressure with an oxygen content of 8% or less by volume?
按体积计最多40%的气体的诱导剂，涡旋泵，和特殊的泵的设计，用于气体提取的有效性进行了讨论。
The effectiveness of inducers, vortex pumps, and special pump designs for gas extraction for up to 40 percent gas by volume are discussed.
从2004年起，用于电视、电脑和手机的液晶平板显示器出售量按体积计涨了十倍，同时价格下降了75%。
SINCE 2004 sales by volume of LCD flat-panel screens, used in televisions, computers and mobile phones, have increased tenfold, and their prices have fallen by three-quarters.
从2004年起，用于电视、电脑和手机的液晶平板显示器出售量按体积计涨了十倍，同时价格下降了75%。
SINCE 2004 sales by volume of LCD flat-panel screens, used in televisions, computers and mobile phones, have increased tenfold, and their prices have fallen by three-quarters.
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