Either keep up the good work or you better change your strategy because you are not mastering the material.

保持好的工作,或者你最好改变你的策略,因为你不擅长处理这个材料。

麻省理工公开课 - 固态化学导论课程节选

You are doing a great work. Keep up the good job because I know you can do it.

你做得真棒！再接再厉哦，相信你能行的！

How long课堂 - SpeakingMax英语口语达人