向下

例句：

1. 1. The sun sets at the bottom of the sky.
   太阳在天空的底部落下。
2. 2. The plane was descending towards the runway.
   飞机正在向跑道下降。
3. 3. She walked down the street to meet her friend.
   她沿着街道走去会见她的一个朋友。