定向只是面向正确的方向；导航包括找到从 A 点到 B 点的路线。

Orientation is simply facing in the right direction; navigation involves finding ones way from point A to point B.

youdao

对于Stokes定理中的定向——，观察这里，它的法向量应该是这个方向。

Well, the orientation I should have for Stokes theorem is that Well, if you look at the convention around here, it tells us that the normal vector should be going this way.

youdao

当我在曲线上时，我是在曲面的边上的，所以一个是沿着曲面的边指，那个就是曲线的定向，另外一个就要指向曲面里面的那个方向。

And when I am on the curve I am on the boundary of the surface, so there is a direction along the surface that is the curve and the other one is pointing into the surface.

youdao