走下坡路

例句：

1. 1. The car was driving down the hill when it hit a patch of ice and skidded to a stop.
   汽车在下山时遇到了冰面，然后打滑停了下来。
2. 2. The hikers were descending the mountain when they heard a loud noise coming from the valley below.
   登山者正在下山时，听到了山谷下方传来的巨响。
3. 3. The team had to turn back up the hill after losing their way in the fog.
   在浓雾中迷路后，队伍不得不重新上山返回。