descaling unit

例句：

1. 1. The team's performance has been decelerating since the beginning of the season.
   自从赛季开始以来，该队的表现一直在下降。
2. 2.The car's speed was reduced to a more manageable level by the decelerating unit.
   汽车的速度通过减速装置被降低到一个更可管理的水平。
3. 3.The engineer used a decelerating unit to slow down the train before it reached the station.
   工程师使用一个减速装置来减缓火车在到达车站前的运行速度。