pulley基本解释
n,[机]滑轮；皮带轮；滑车,同近
a system of ropes and pulleys.绳索滑轮系统
滑轮，滑车，皮带轮英释nna piece of equipment consisting of a wheel over which a rope or chain is pulled to lift heavy things
belt pulley,皮带轮；皮带盘.短语
