pulleys造句
Block and tackle: Combination of
pulleys with rope or cable, commonly used to augment pulling force.
滑轮和滑车组: 带绳索和缆绳的滑轮组, 通常用于增大拉力.
Levers and
pulleys are simple machines.
杠杆和滑轮是简单机械.
Among them were rickshaw
pulleys, peddlers, policemen and servants.
这些人有的拉车,有的做小买卖, 有的当巡警,有的当仆人.
a system of ropes and
pulleys绳索滑轮系统