英语语法分析

Well, we've seen formulas for ndS in various Settings.

我们已经在很多情形下见过ndS的公式。

So, we need to set up the flux integral for a vector field dot ndS.

需要建立向量场点乘nds的通量积分。

And, once you have a formula for ndS, that will relate ndS to maybe dx dy, or something else.

一旦有一个ndS的公式，那将会把ndS和dx, dy联系起来，或者其他的一些东西。