And then remember how you solve this 'cause otherwise completely useless exercise.

记住我是怎么解决这个问题的，否则就是一次,无意义的演练了，对吧。

哈佛公开课 - 计算机科学课程节选

But the problem is if you use the word "Language" impossibly, incredibly broadly, then from a scientific point of view it becomes useless to ask interesting questions about it.

但问题是,如果你无限宽泛地使用"语言"一词,那么从科学的角度来看,探究语言就变得毫无意义了

耶鲁公开课 - 心理学导论课程节选