Now some of this might be luck but I don't think it's all luck because he's done this consistently for so many years.

也许这里面有运气的成分,但我不认为这都归因于好运,因为他一直从事着这项事业

耶鲁公开课 - 金融市场课程节选

In some cases, the back of the head could be more expressive than the front, in which case this is your opportunity and I wish you luck.

有些时候,后脑勺确实比正脸更有表现力,这才是你们的机会,祝你们好运

耶鲁公开课 - 基础物理课程节选