But one thing at a time. I wanted to point out to you that very often functions that you see in real life satisfy many nice relations between the partial derivatives.

但是有一件事情，我必须指出来，在现实中，很多函数的偏导数之间，存在着很好的关系。

youdao

But one thing at a time. I wanted to point out to you that very often functions that you see in real life satisfy many nice relations between the partial derivatives.

但是有一件事情，我必须指出来，在现实中，很多函数的偏导数之间，存在着很好的关系。

youdao