Let me call that region D of divergence, of curl F dV.

称之为在区域D上divdV的积分。

youdao

So, we'll call that the double integral of our region, R, of f of xy dA and I will have to explain what the notation means.

称之为区域R上fdA的二重积分,会向大家解释这些符号的含义的。

youdao

What does it mean to take the average value of some function f in this region r?

在区域r上求函数f的平均值,这是什么意思？

youdao

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