We know it has to big anyway, since we can extract heat from it without changing the temperature.

我们知道它必须很大，因为我们得从中提取热量,但不改变它的温度。

麻省理工公开课 - 热力学与动力学课程节选

But you have to submerge yourself in those groups, and I don't speak it enough,

但你必须把自己沉浸于这些小组里，我说得不够多。

学习外语的时候 - SpeakingMax英语口语达人

But, it doesn't always work because you have to be damn sure you're right.

但此方法也不经常奏效因为你必须得,十分肯定你的做法是正确的。

耶鲁公开课 - 金融市场课程节选

Now, in that Northern society and here we're using labels pretty loosely, but so be it the northern states; and well I'll leave the outline up for the moment. No I won't.

现在,在北方社会,现在我们标记做得很散,但必须这样,北方的州,我呆会会给你们一个大纲,但不是现在

耶鲁公开课 - 美国内战与重建课程节选

Students get upset. Parents get upset. But at some point, students have to learn,

学生们忐忑不安，家长们也是。但从某种程度上讲，学生必须得学习教训，

对于抄袭的想法 - SpeakingMax英语口语达人

It's harder than you think, right, but that's the kind of thing that musicians, particularly percussion players, have to be able to execute.

比你想的要困难得多,但这就是音乐家,尤其是打击乐手所必须具备的能力

耶鲁公开课 - 聆听音乐课程节选

or to another subject. But you know that you need to get this done.

或者是另外一种主题。但你知道你必须得完成这个任务。

How many课堂 - SpeakingMax英语口语达人

While China is going to continue to buy things, it doesn't mean they're going to buy them from us necessarily even though the dollar has gone down a great deal Student: Thank you. This is my last question.

虽然中国还将会继续购买原产品,但那并不意味着他们必须得从我们这买,即使美元已经,大幅度地贬值了,学生：谢谢，这是我最后一个问题。

耶鲁公开课 - 金融市场课程节选