So, let's see this eraser actually never works very well so I'm just going to draw below it.

这个清除器不能很好地运行,我将在下面画出它。

哈佛公开课 - 计算机科学课程节选

So I don't know how to draw personalities very well on the board, so I'll draw little stick figures of bodies,but I mean these to be the personalities.

我不知道怎样在黑板上画出人格，我就画几个棍子小人来代替吧。

耶鲁公开课 - 死亡课程节选

Well, it was not very hard for me to draw this red blood cell here, it's just an oval, and one reason I draw it like an oval, is that that's basically what it looks like if you look at it.

我可以很容易的画出,一个血红细胞,就画个椭圆足矣,因为它看上去就是这个样子的

耶鲁公开课 - 生物医学工程探索课程节选