But it doesn't have to be through philosophy, I think it can be through a wide range of other studies and other activities that you make a difference.

但不一定仅仅是通过哲学，通过学习其他的学科,通过其他的活动，你也一样可以发挥作用。

普林斯顿公开课 - 人性课程节选

you know, there're...it's not quite as celebrity, not quite as hip, but it's certainly, certainly still, you know, a lot of rich, rich people.

那儿有的……不一定是名人、时尚人士，但肯定是许许多多的有钱人。

富家孩子的生日 - SpeakingMax英语口语达人

Sometimes you can design drugs that act like a natural ligand without being the natural ligand.

有时你能设计具有天然配体功能的药物,但它不一定和天然配体相同

耶鲁公开课 - 生物医学工程探索课程节选

So this advertisement tells you that the great classic of modernism is something you stride into like a man, but you don't have to be a particularly extraordinary man to do so.

这广告告诉你们现代主义的伟大经典,在于让你们如男人一样勇敢地投入阅读，但你不一定非得成为特别出众的人来阅读。

耶鲁公开课 - 1945年后的美国小说课程节选

That doesn't mean that the majority is wrong here.

但这次则不一定了。

麻省理工公开课 - 热力学与动力学课程节选

Living in a republic alone doesn't guarantee you more freedom.

但有时即使是生在共和国里,也不一定能享有更多的自由。

耶鲁公开课 - 政治哲学导论课程节选

you know, people are extra friendly, but it's not necessarily genuine or whatever.

你知道，特别友善，但不一定是真诚的或是怎么样的。

加州的天气 - SpeakingMax英语口语达人

A candidate could say during an election that "I'm a moderate candidate, I'm at position 5" but you might not believe him or her.

一个候选人在整个大选中可能说,我是个中立的候选人,我的立场是5,但你不一定就相信他/她的说法

耶鲁公开课 - 博弈论课程节选

It suggests, from the beginning, a kind of loftiness and impartiality of perspective characteristic of the philosopher, but not necessarily the citizen.

那一开始，便暗示着一种高尚及公平的观点,一种哲学家的特性，但不一定是公民所具备。

耶鲁公开课 - 政治哲学导论课程节选