在缓慢的动作中，我们可以专注于自己的手和脚。

During slow movements, we can focus on our hands and feet.

youdao

同样，我们的脚在水里也会起皱。

Similarly, our feet also get wrinkled in water.

youdao

我如果要求你在空中书写自己的名字，或用你的肘部、你的鼻子或是你的脚，大差不差，我们还是会得到你独一无二的签名。

I could ask you sky-write it, or make it with your elbow, or your nose, or your foot, and pretty much we’d get your unique signature.

youdao

In Philip's case, we ask the question, does he have zero or none zero socks on his feet?

在飞利浦这个例子中，我们就需要判断，他的脚上有没有袜子？

哈佛公开课 - 计算机科学课程节选