Know what you've already tried, don't waste your time trying it again.

记住你已经尝试过的错误，不要再次浪费你的时间。

麻省理工公开课 - 计算机科学及编程导论课程节选

But, they create a Central Commission of Hygiene and Sobriety which tell people-- encourage people to eat healthfully, and don't just get wasted all the time-- which is what I would have done, I'll tell you that.

但巴黎人很快成立了中央卫生委员会,旨在宣传并鼓励人们,健康饮食,告诫人们不要总是浪费时间,老实说,如果我在那里的话,早就这么做了

耶鲁公开课 - 1871年后的法国课程节选