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

and to know your weak spots and know like... just practice stuff that you're not very good at.

知道自己的弱点在哪里，知道…就练习不太擅长的那些。

收到了录取通知书 - SpeakingMax英语口语达人

Not only am I not an ethicist and I'm not good at those kinds of problems, I'm not much of an artist either.

我不仅不大擅长伦理学,不大擅长回答这样的问题,更不擅长艺术

耶鲁公开课 - 生物医学工程探索课程节选

I should be able to do nice bell-shaped curves, but it's harder than it looks standing up here; so that's your bell-shaped curve.

我还是挺擅长画钟型曲线的,但站着画真的不太容易,这就是钟型曲线

耶鲁公开课 - 金融市场课程节选

He was good in this sort of technique and that he was not so good.

他很擅长这方面的技巧,那方面却不太擅长。

麻省理工公开课 - 电影哲学课程节选

They differ according to their IQs; whether they're aggressive or shy; whether they're attracted to males, females, both or neither; whether they are good at music; whether they are politically liberal or conservative.

他们的智商也不同,他们自信还是害羞,他们是否喜欢男人,女人,都喜欢,还是都不喜欢,他们是否擅长于音乐,他们是政治上的自由派还是保守派

耶鲁公开课 - 心理学导论课程节选

The math quiz is on calculus, and I am really bad at it.

这次数学考试是关于微积分的，是我特别不擅长的部分。

I'm worried 实战 - SpeakingMax英语口语达人