slack spring

例句：

1. 1. The car's suspensionsystem is a slack spring.
   汽车的悬挂系统是一个松紧带。
2. 2. Theslack spring was causing the doorto stick.
   松紧带导致车门卡住。
3. 3. The slack spring was causingthe door to stick.
   松紧带导致车门卡住。