cranking lever

例句：

1. 1. Thecar's engine is a cranking lever that powers the wheels.
   汽车的引擎是一个曲柄杠杆，它驱动车轮。
2. 2. The engineerused a cranking leverto adjust the gears.
   工程师使用一个曲柄杠杆来调整齿轮。
3. 3. Thecranking lever was the only thingkeeping the machine running.
   曲柄杠杆是保持机器运转的唯一东西。