你用它来画直线。

You use it for drawing straight lines.

youdao

那个国王为什么画直线啊？

Why did the king draw straight lines?

youdao

我希望你日记本中不必再画直线的那一天早日来临。

I hope the day comes soon when you don't have any line in your diary.

youdao

So putting that all together, I know that it must go through here again, and once again, i get a straight line.

把这些点连在一起,我知道它一定会经过这一点,这次我们又画出了一条直线

耶鲁公开课 - 博弈论课程节选

Now there many ways I can connect these two points together. The simplest way is to draw a straight line. It's called the linear interpolation. My line is not so straight, right here. You could do a different kind of line.

最简单的办法是,像这样画一条直线,这叫线性插值,不过我的这条线画得不太直，你也可以用别的办法,比如一条抛物线。

麻省理工公开课 - 热力学与动力学课程节选

Let's draw a line through a scatter of points here.

我们来画一条切合散点的直线

耶鲁公开课 - 金融市场课程节选