up-and-down maneuver

例句：

1. 1. The car was bouncing up and down on the bumpy road.
   汽车在颠簸的路面上来回颠簸。
2. 2. The team practiced up and down the field during the game.
   球队在比赛期间在场地上来回练习。
3. 3. The hiker walked up and down the mountain path, enjoying the fresh air.
   徒步旅行者沿着山间小径来回走动，享受着新鲜空气。