但是在这段时间里，我更多使用的是离散数学而不是微积分，所以我需要复习才能够找出答案。

But, I use discrete mathematics much more than calculus these days, so I need to go back and look at how to find the answer.

youdao

我不需要真的计算通量积分。

Then I don't have actually to compute the flux integral.

youdao

对于剩下的愿意忍受我的人，我们继续，现在我们需要积分。

For the rest of you who are willing to bear with me, let's continue. So now let's just integrate.

youdao