“这是对你服务的回报。”老太婆说着，关上了门。

"That is in return for your services." said the old woman, and she shut the gate.

youdao

你可能会说，学好另一门语言比学下好国际象棋要费力得多，它涉及到对一套复杂规则的敏感性，以及对环境的敏感性。

You can argue that learning another language well is more taxing than, say, learning to play chess well—it involves sensitivity to a set of complicated rules, and also to context.

youdao

你应该掌握一门，你对它十分的精通的语言，意思是说，你要用这一门语言成功地编写过一些程序。

You should know the language in which you will be developing inside out, which means you should have written quite a few programs in that language successfully.

youdao

On the other hand, you don't have to withhold information that may be useful to the class.

另一方面,你又不能刻意保留对这门课有用的信息

耶鲁公开课 - 基础物理课程节选

You're not going to need to know a lot about this for this course, but this is--I wanted to get the basic ideas down.

对于本门课程来说,你不必,对刚才讲的概率的知识有很深入的了解,我只想介绍一些概率论的基本概念

耶鲁公开课 - 金融市场课程节选

And he says to me, " "Tal, I hear you teaching a class on happiness."

他对我说，“Tal，我听说你教一门有关快乐的课程“

哈佛公开课 - 幸福课课程节选