And the problem is, that we want to build this abstract data type, but we'd like to basically know what kind of object is it, and what functions actually belong to it, how do we use them?

然后我对它们运行了这个方法，就是这一小段代码这个方法,这有意义么？,当然没有了，对不对？,因为你知道，当你把两个极坐标，表示的点进行相加运算的时候？

麻省理工公开课 - 计算机科学及编程导论课程节选

You want to use "make sure" to declare that you want something to declare that something needs to be done.

当你声称想要某东西，或表示某事必须做到的时候，可以使用“make sure”句型。

Make sure 课堂 - SpeakingMax英语口语达人

And when I say internuclear distance, we actually call this r here.

而当我说核间距的时候这里，我们其实还是用，r，来表示它。

麻省理工公开课 - 化学原理课程节选

Now, when you work with components, Ax and Ay, if I didn't mention it, they are the components of the vector, you can do all your bookkeeping in terms of Ax and Ay.

当你们在计算分量 Ax 和 Ay 的时候,即使我没有说明,你们也要记得它们是矢量的分量,你们可以都用 Ax 和 Ay 的形式来表示

耶鲁公开课 - 基础物理课程节选

Because when you're saying "I'm about to," you're saying "I have confidence about what's going to happen next."

因为当你说“I'm about to”的时候，你在表示“我有充分的信心接下来会发生什么。”

I'm about to 课堂 - SpeakingMax英语口语达人

When you say "it must", this usually does not mean it needs to do something.

当你说“It must”的时候，通常并不表示它需要做某事。

Must 课堂 - SpeakingMax英语口语达人