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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所有时钟都必须有一个均匀、恒定或重复的划分时间等量增加的过程或动作。

All clocks must have a regular, constant or repetitive process or action to mark off equal increments of time.

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研究人员首先要求被试者就谁能承受的温度可以长时间的恒定在那个温度，以及在不同的温度下他的痛感变化等问题做好记录。

The researchers first asked the participants to hold a block whose temperature could be controlled and report how much pain they felt at different temperatures.

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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

So we're to assume we can get to any piece of data, any instruction in constant time, and the second assumption we're going to make is that the basic primitive steps take constant time, same amount of time to compute. Again, not completely true, but it's a good model, so arithmetic operations, comparisons, things of that sort, we're all going to assume are basically in that in that particular model.

因此如果我们假设在恒定的时间内,我们可以取得任何一块数据,任何一种数据结构的话,我们要做的第二个假设就是,基本的原始操作计算花费的时间是恒定的,这个假设也不是完全正确的，但这个模型其实挺不错的，因此算法操作，比较，这一类的事情，我们在这个特定的模型中都假设是基本的,操作，花费的时间是恒定相同的。

麻省理工公开课 - 计算机科学及编程导论课程节选