为了使地球保持恒定的平均温度，来自地球的这种辐射必须平衡入射的太阳辐射。

For the Earth to maintain a constant average temperature, such emissions from the planet must balance incoming solar radiation.

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工厂生活需要一个更严格的时间表，在那里，工作在铃声中开始，工人让机器以恒定的速度保持运行。

Factory life necessitated a more regimented schedule, where work began at the sound of a bell and workers kept machines going at a constant pace.

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对于那些使用恒定的冰川融化的水作为饮用水的数百万人来说，冰川面积不断缩小是一个难题。

Shrinking glaciers are a problem for million is of people who use regular glacier melt for drinking water.

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So, and of course, you know, keeping entropy as a fixed variable for a system like that is extremely cumbersome.

所以，对这样的系统要求它们的熵保持恒定,和一个非常笨拙做法。

麻省理工公开课 - 热力学与动力学课程节选

To ask questions like how much heat is released in a chemical reaction that takes place at constant temperature.

当我们想要知道,当一个化学反应在恒定的温度下发生时,会放出多少热量时。

麻省理工公开课 - 热力学与动力学课程节选

Or another way of saying it is, we're going to use as the basic steps, those operations that run in constant time, so arithmetic operations.

我们用可以在恒定时间内完成的操作,算法，比较,内存读取。

麻省理工公开课 - 计算机科学及编程导论课程节选