萤火虫用它们的光来吸引配偶。

Fireflies use their light for attracting mates.

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蜗牛为什么要背着它们的房子？

Why do snails wear their houses?

youdao

youdao

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

There they are. And, when they are named, they are named by suggestion by the scientist who have isolated them.

它们在这，当它们被起名的时候，是由科学家们建议的,那些提取它们的科学家。

麻省理工公开课 - 固态化学导论课程节选

If you scroll back up on the printout or screen here, you'll see that you can actually not only declare function's prototypes, their general structure.

如果我回滚到打印输出或者这个屏幕，你们将看到你们不仅可以声明函数的原型,它们的一般结构。

哈佛公开课 - 计算机科学课程节选