dxdy So that's just x. So, that means that du dv is x dx dy.

这个就是x，这就意味着dudv是x倍的。

youdao

For example, the moment of inertia about the z-axis is dV the triple integral of x squared plus y squared density dV.

例如，关于z轴的转动惯量,是∫∫∫δ

youdao

For example, the moment of inertia about the z-axis is dV the triple integral of x squared plus y squared density dV.

例如，关于z轴的转动惯量,是∫∫∫δ

youdao