乔安娜：因为我画得不好。

Joanna: Because I'm not very good.

youdao

难道我画得不好吗？

Did I paint it too poorly?

youdao

云波：是的，我画得不好，但是我特别喜欢画。

Yunbo: Yes, I have. I'm not a very good painter, but I painting a lot.

youdao

And that's the following. Let's take a particle that is moving in the x-y plane, so that at one instance-- sorry, let me change this graph-- is here--oh, this is bad.

接下来,我们来看一个物体,在 x-y 平面内运动,在这个例子中,对不起,我要重画一下这个图,在这里,这画得不好

耶鲁公开课 - 基础物理课程节选