Something like this. That would be perfectly fine interpolation. All right, we choose to have a linear interpolation.

这种插值的方法也是完全可行的,好，现在我们决定使用，线性插值的方案。

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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。

热力学与动力学课程节选 : 麻省理工公开课