"People did not believe we could do it. And yes,we have done it.

VOA: standard.2010.07.05

For all I could tell, people did equally well but this experiment has been done tens of thousands of times and you could do it yourself on a computer screen.

据我所听到的，两次都差不多,但这个实验做过几十万次,你们可以在电脑上做。

耶鲁公开课 - 心理学导论课程节选

that something you that you either did or did not do but should have done.

为一些你之前做过的或是本该做却没有做的事情表示遗憾。

I should have 课堂 - SpeakingMax英语口语达人