所谓的电荷密度是指单位体积的电荷。

By the charge density we mean the per unit volume.

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每单位体积粉末的质量，包括粒子之间的空气。

Mass per unit of volume in powder form, including the air trapped between the particles.

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在物理学上，是以每单位体积的质量来鉴别物质。

In physics it is an identification of material by noting its mass per unit volume.

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它因为其大的晶型，单位体积只含有精盐一半的钠。

It has half the sodium of table salt, thanks to its large crystals.

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同时使单套设备满负荷运行，减少设备开启数量，降低单位体积氢气能耗。

This step can make one facility run at full capacity, another at standby application status.

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测量体积或容积的单位。

A unit of measurement of volume or capacity.

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一桶液量之单位：许多体积或容量单位的任一个。

Any of various units of volume or capacity. In the U. s.

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一桶液量之单位：许多体积或容量单位的任一个。

Any of various units of volume or capacity. In the U. s.

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