这个孔隙空间被称为孔隙度，用岩石总体积的百分比表示。

This pore space is known as porosity and is expressed as a percentage of the total rock volume.

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因为这些星系的质量分布在更大的区域，它们每单位体积的恒星数量比传统星系要少得多。

Because these galaxies' mass is spread out over larger areas, they have far fewer stars per unit volume than do conventional galaxies.

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头围是大脑体积的一个衡量指标，所以新生儿头围越大，表明他们的大脑发育越快。

Head circumference is an indicator of brain volume, so a greater increase in head circumference in a newly-born baby suggests more rapid brain growth.

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So now we have a relationship between the ratios of these volumes that are reached during these adiabatic paths.

现在我们有了一个联系,这些绝热过程中,体积比的关系式。

麻省理工公开课 - 热力学与动力学课程节选

In other words, if we don't have to worry about entropy or volume equilibrium is achieved when energy is at a minimum.

换句话说，如果我们不担心熵,和体积的平衡,那么能量就得是最小的。

麻省理工公开课 - 热力学与动力学课程节选

I'm going to say, quite to the contrary, the positive charge is concentrated at the center in a tiny, tiny, tiny volume.

我要说的是，完全相反，正电荷集中在中心,在一个非常非常小的体积内。

麻省理工公开课 - 固态化学导论课程节选