.. We've done a lot-- I shouldn't say we haven't done anything-- but we can do a lot more.

我们做了很多-,我不该说我们什么都没做-,但是我们可以本做得更好。

耶鲁公开课 - 金融市场课程节选

So, there was some thought that maybe we could do better.

所以,我们总觉得应该可以做得更好

耶鲁公开课 - 生物医学工程探索课程节选