The wind is like propelling the system through the area such that the open end of the U, so to speak, is going forward.

风可以推进整个系统通过该区域，像U型的开口端，总之就是往前推进。

The wind is like propelling the system through the area such that the - - the open end of the U, so to speak, is going forward.

风会推动整个系统穿过这片区域，可以说--系统向着U型的开口端会往前走。