So, if you propagate that through the whole year, and you have the basic mastery of the concepts, 50 is a pass.

如果你一整年都在认真学，那你就可以掌握基本的概念,50分就可以通过。

麻省理工公开课 - 固态化学导论课程节选

Because you see that your brother is working so hard.

因为你看到你的弟弟学得很认真。

Don't 课堂 - SpeakingMax英语口语达人