So, we don't necessarily recommend that, but what was pretty cool especially that day, okay, so this is okay.

所以，我们不一定推荐那个，但是尤其是那一天，是相当酷的，好的，现在好了。

哈佛公开课 - 计算机科学课程节选

Well, not everybody, but everybody can use to keep emails safe, just like sort of a really easy thing to do.

嗯，不一定是所有人，但是每个人都可以轻而易举地用这种密码来保证自己邮箱的安全，

积极参与俱乐部活动 - SpeakingMax英语口语达人

So as we said when we first introduced covalent bonds, it's a sharing of electrons, but it's not always an equal sharing.

当我们刚开始介绍共价键的时候，我们说过电子是被共用的，但是共用却不一定是均等的。

麻省理工公开课 - 化学原理课程节选

That would not necessarily be true in other parts of the world but it is true in this part of the world.

在其他地方,情况不一定这样,但是在美国,事实就是这如此

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

being entertaining shouldn't be dreary and if anything is clearly full of purposes of entertaining It's done well enough. It becomes an art.

但是娱乐不一定就要粗俗,一个东西，只要明显带有,娱乐的目的,而且很受欢迎的话，那它就成了艺术。

麻省理工公开课 - 电影哲学课程节选

But there's no guarantee that they will be.

但是不一定总是这样。

麻省理工公开课 - 热力学与动力学课程节选

Oh, but I have a couple days. I don't have to do it right now."

哦，但是还有几天。我不一定非要现在做。

主修古典文学 - SpeakingMax英语口语达人

But for me personally, it doesn't have to be first class.

但是对我个人而言，不一定需要最上乘的。

喜欢巧克力吗？ - SpeakingMax英语口语达人