This brash, having more surface area per unit volume than unbroken ice, melts faster.

这种冰的单位体积表面积比完整的冰大，融化速度也快。

Molality refers to moles per unit mass and molarity refers to moles per unit volume.

摩尔浓度是指每单位质量的摩尔数， 摩尔浓度是指每单位体积的摩尔数。

We like to count the sperm so we can work out how many sperm there are per unit volume.

我们喜欢对精子进行计数，这样我们就可以计算出每单位体积有多少精子。

But when using a capacitor, it’s useful to know how much energy is stored in an electric field per unit volume.

但是在使用电容器时， 了解每单位体积的电场中储存了多少能量是很有用的。

But when using a capacitor, it's useful to know how much energy is stored in an electric field per unit volume.

但是当使用电容器时，计算功率很有用 以体积单位存储在电场中。

Then there appeared to be less common sources per unit volume of space for the nearby sources than for the distant ones.

然后，与远处的来源相比，附近来源的每单位空间体积的常见来源似乎更少。

Then, you can combine the energy density for both fields, solving for the total energy per unit volume within the wave overall.

然后，您可以结合两个场的能量密度，求解一般波内每单位体积的总能量。

Specifically, you use these magnitudes to calculate what's known as the energy density of each field, which is the amount of energy stored in a field per unit volume.

具体来说，您可以使用这些体积来计算所谓的每个场的能量密度，即每单位体积存储在场中的能量。

We often want to know how much energy is in a certain location, like between capacitor plates, so we use energy density, or the amount of energy stored in the electric field per unit volume.

我们经常想知道特定位置的能量，例如两个板块之间的能量， 所以我们使用能量密度，或者说在一体积内存储在场中的能量。