When we know two vectors in a plane, it let us find the normal vector to the plane, and that is what we need to find the equation.

当我们已知平面上的两个向量，我们就可以找到，这个平面的法向量，然后我们就可以用法向量来找到方程。

youdao

OK, and that's going to be the normal vector to the surface or to the tangent plane.

这就是切平面的，或者说这个曲面的法向量。

youdao

The plane had to deviate from its normal flight path.

那架飞机只好偏离正常的航线。

youdao

The thieves just needed to get around all the normal airport security that prevented them from walking into the airport and getting to the plane through the front door.

CNN: Diamond heists are forever

He said the plane did not crash land but came to a normal halt after the blow out.

BBC: Tyre blowout closes Manchester Airport