Maybe I made a big mistake by likening it to an organic chemistry course-- I don't mean to turn you off.

也许将其比作有机化学课,是个错误,我不是故意想倒你们胃口的

耶鲁公开课 - 金融市场课程节选

If I do this, which is kind of a mistake we made last time, if deliberately.

如果我故意这样做，这有点像,上次我们犯的一个错误。

哈佛公开课 - 计算机科学课程节选