lever shears alligator shears

例句：

1. 1. The engineer used a lever to lift the heavy box.
   工程师用杠杆把沉重的箱子抬起来。
2. 2. The car's engine is powered by a lever that turns a gear.
   汽车的引擎是通过一个杠杆转动齿轮来驱动的。
3. 3. The farmer uses a lever to pry open the gate.
   农民使用杠杆撬开大门。