In the case of running through the rain, you can figure that out using parallelepipeds again.

在雨中穿梭时，你同样可以使用“四棱柱法则”。

And since the volume of a parallelepiped (that's a 3D parallelogram) doesn't depend at all on its slant, then no matter how fast you're moving horizontally the same amount of rain will land on top of you each second.

由于四棱柱（即平行四边形对应的立体模型）的体积并不受它倾斜的角度决定，不管你在水平方向上跑得多快，每秒你头顶上都会淋到等量的雨。