请注意，在一个封闭的宇宙你可以朝着一个方向开始旅行，如果允许足够的时间，最终将返回到出发点；而在一个无限的宇宙中，你永远不会回来。

Note that in a closed universe you could start a journey off in one direction and, if allowed enough time, ultimately return to your starting point; in an infinite universe, you would never return.

youdao

如果你允许你的鞋在两次健身当中减压和干透，那么他们持续时间的会长一些。

Your shoes will last longer when you allow them todecompress and dry out between workouts.

youdao

如果你日有所思，在一天中划出这样一个用来考虑的时间——并且，只允许自己在这个时间里忧虑。

If your worries are interfering with your day, schedule a time each day that you're going to worry - and only worry during that time.

youdao

Now we're gonna hand you some framework, that code that we wrote with some blanks to get you accustomed to the idea of one, writing larger programs than time might allow if you were doing it on your own.

现在就提供给你们一些框架，在代码中有些空白,是为了让你们了解其中的思想，如果是你自己，若时间允许,那就尽量写大的程序。

哈佛公开课 - 计算机科学课程节选