You can talk about working hard on your joint problem sets, but as long as you go home and you don't work hard, it doesn't help.

你大谈特谈你在多么努力地做家庭作业,但是回家后如果你依旧偷懒,这还是无济于事

耶鲁公开课 - 博弈论课程节选

You've been working hard all day and you just can't push it anymore.

你已经用功了一整天，你累得完全不想再动弹了。

I like课堂 - SpeakingMax英语口语达人

So, so far, we've been working pretty hard and we haven't, I guess, learned a lot, we've just kind of solved the thing out.

到目前为止我们的计算真的很繁琐,但是我觉得我们没学到什么东西呢,我们只是解出了一道题罢了

耶鲁公开课 - 博弈论课程节选