这是一个很好的应用程序，可以帮助你锻炼。

It is a good app that can help you exercise.

youdao

那么，你什么时候能说你在代码中很好的应用了OOD ？

Now, when can you claim that you have applied good ood in your code?

youdao

这个性质很漂亮，因为它有一个很好的应用，可以用来，求算很多东西的切面。

That's actually pretty neat because there is a nice application of this which is to try to figure out, now we know, actually how to find the tangent plane to anything, pretty much.

youdao

Well, one of the lessons of this course is we have a wonderful theory, but we don't manage it well, mostly.

我们在这门课里可以学到的一点是,我们拥有很好的理论，但在实践中却总是不能应用得当。

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