通常，当它们游泳时，会发出咔嚓的声音，所产生的声波会在回声中被反射回到它们身边。

Usually, as they swim, they make clicking noises, and the resulting sound waves are reflected in an echo and travel back to them.

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所以一旦人们发现了其中一个，通常不会把它和后期所找到的弄混。

So when one is found, it's usually not confused with points made by later groups.

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招待所的卧室里不是通常都有可以给你放东西的储物柜吗？

Don't hostels usually have lockers in the bedrooms where you can leave your stuff?

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We can anatomize some of the forms of power that have been most commonly attributed to this greatest English poet.

我们可以剖析一下这种种,大家通常认为这伟大的英国诗人所具有的力量。

耶鲁公开课 - 弥尔顿课程节选

We've been discussing energy diagrams a lot in this class, it's a very good way to visualize exactly what's going on.

在这个课里面，我们已经讨论过很多次能量图了，它通常是一个很好的把所发生的事情形象化的方法。

麻省理工公开课 - 化学原理课程节选

That tells us the direction of spontaneous change for ordinary processes, chemical processes, mixing and you name it, under conditions that are easy to achieve in the lab.

这个物理量告诉我们在实验室,能够实现的条件下通常的过程，化学过程，混合以及你所能想到的过程，自发进行的方向。

麻省理工公开课 - 热力学与动力学课程节选