prop leg

例句：

1. 1. 腿
   尤指支撑身体的部分
2. 1. The man was propping up the wall with his leg.
   那个人用他的腿支撑着墙。
3. 2. The ship's propeller is responsible for its forward motion.
   船的推进器负责其前进的动力。
4. 3. The car's engine is a propeller that powers the vehicle.
   汽车的引擎是一个推进器，为车辆提供动力。