This whole process may go on for days, or months, sucking a large quantity of energy.

这个过程可能会持续很多天，很多个月，吸走大量的能量。

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The results indicated that although the quantity of energy is maintained, but the quality of the energy is degraded during mixing.

结果表明：高、焦炉煤气混合过程，虽然能量保持不变，但能量品质降低。

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Energy in the steam in the system of the invention is not released in vain, and a great quantity of energy is obtained from outside by the heat pump.

本发明系统中蒸汽中的能量不仅没有被白白释放掉，而且还通过热泵从外界获取了大量能源。

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We'll then look at the quantity, internal energy, which we define through the first law, and we think of it as a function of two variables T and V.

接下来我们考虑内能，这是由热力学第一定律定义的物理量，我们把它看作T和V的函数。

麻省理工公开课 - 热力学与动力学课程节选

Energy density refers to the quantity of energy that can be contained in a given unit of volume, area, or mass.

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The astronomers measured the quantity and energy of X-rays emitted by eight distant galaxy clusters.

BBC: NEWS | Science/Nature | Dark energy tops science class

The difference is merely whether the same quantity of waste heat energy is thrown away at the source or in the vehicle.

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