pulley

名词 pulley:

1. a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope
   同义词：pulley-block, block

1. 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。
2. 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
3. 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
4. The pulley of the clothes line jumped the track and Mother's washing fell down.
   晾衣服绳子的滑轮脱绳了，妈妈洗的衣服掉了下来。

pul.ley

n.（名词）
【复数】 pul.leys
A simple machine consisting essentially of a wheel with a grooved rim in which a pulled rope or chain can run to change the direction of the pull and thereby lift a load.
滑轮装置：一种有一个拉绳或链子穿过的有槽的轮子且通过改变拉力的方向而拉起重物的简单机械
A wheel turned by or driving a belt.
滑轮：通过拉一根带子转动或牵拉一根带子的轮子

来源：
Middle English poley
中古英语 poley
from Old French polie
源自 古法语 polie
and from Medieval Latin poliva
并源自 中世纪拉丁语 poliva
both ultimately from Greek polos [axis] * see k wel-
都最终源自 希腊语 polos [轴] *参见 k wel-