Our flag is raised to the top of a pole by a rope and two pulley.
我们的旗帜被用一根绳子和两个滑轮升到了竿顶。
A simple device, such as a lever, a pulley, or an inclined plane, that alters the magnitude or direction, or both, of an applied force; a simple machine.
机械装置一个简单装置，如杠杆、滑轮或斜面刨，可以改变作用力的大小或方向或同时改变；简单机械装置
A rope passed through an overhead pulley, as at the top of a mast, that is used for hoisting.
吊绳用于提升事物的穿过高架滑轮的绳索，如在杆的顶端
