但是她的下颌线呢？

But her jaw line?

这反映了什么样的需求曲线呢?

What sort of demand curve is that?

怎样参数化空间上的椭圆曲线呢？

Yes? How do you parametrize an ellipse in space?

黑洞中逃离，怎么能看见x射线呢，答案是，我们能看到？

Because if nothing can come out of a black hole, how can we see x-rays?