That's because the ideas of physics don't fall into 75-minute segments and sometimes they spill over a little bit.

因为物理的知识不是死板的75分钟课程,所以我会有时候做一些微调

耶鲁公开课 - 基础物理课程节选

When I don't know even necessarily... Well, it's not my choice,

有时候我甚至自己都不一定知道……嗯，这不是我的选择，

有这样的困难 - SpeakingMax英语口语达人

We could also, I think, well, maybe this isn't written out in terms of that convention, which sometimes it's not, so let's also try writing it, such that we have the hydrogen and the oxygen atom there.

我们也可以，我想，好吧，还有可能它不是按照惯例写的，有时候会出现这样的情况，因此，让我们把氢原子和,氧原子成键的情况也写出来。

麻省理工公开课 - 化学原理课程节选

Well,sometimes in response to this thought,people respond by saying, Look,death isn't bad for the person who's dead.

有时候人们对这个想法的反应是，死亡不是对死者不好。

耶鲁公开课 - 死亡课程节选

yeah, go to clubs and bars sometimes, but not always.

是的，有时候去俱乐部，去酒吧，但不是经常去。

在哥伦布环岛 - SpeakingMax英语口语达人

Sometime later, I will deal with functions of more than one variable, which I will briefly introduce to you, because that may not be a prerequisite but certainly something you will learn and you may use on and off.

再过段时间,我要开始处理多变量函数,到时候我会向你们进行简单介绍,因为那不是必须的,但是你们以后会学到,有时候还能派上用场

耶鲁公开课 - 基础物理课程节选

I guess living with roommates can be very difficult sometimes.

有时候跟室友一起住不是很方便。

找房子的方法 - SpeakingMax英语口语达人

So, it works, I think it's just getting too much Sometimes it helps to not actually hit the metal, - just put it next to the -- there we go.

所以，它开始工作了，我认为它太多了,有时候它并不是,帮助轰击了金属，仅仅是把它拉近了。

麻省理工公开课 - 化学原理课程节选

And when we're talking about the amplitude of the wave, we're talking about the deviation from that average level. So, if we define the average level as zero, you can have either a positive amplitude or a negative amplitude.

当我们讨论一个波的振幅时,我们说的是偏离平均位置的量,如果我们把平均位置,定义为零的话，那幅值不是,正的就是负的，有时候人们在。

麻省理工公开课 - 化学原理课程节选