angle of downwash

例句：

1. 1.The wind is blowing the leaves off the trees in a downwash.
   风吹得树叶纷纷落下。
2. 2. The downwash from the chimney carries away the smoke.
   烟囱的下吹风带走了烟雾。
3. 3.The downwash from the air conditioner cools the room.
   空调的下吹风使房间变凉。