sunk handle

例句：

1. 1. The boat hada sunken handle that made it difficultto steer.
   这艘船有一个下沉的把手，使得难以操控。
2. 2. The car's steeringwheel has a sunken handle for easyoperation.
   汽车的方向盘有一个下沉的把手，便于操作。
3. 3. The sinking handle on thedoor is causing problems with the lock.
   门上的下沉把手导致锁有问题。