| 释义 |
pul·ley AHD[p‹lʹē] D.J.[ˈpʊliː]K.K.[ˈpʊli]n.（名词）pl. pul.leys 【复数】- 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
- 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- 1都最终源自 希腊语 polos [轴] * 参见 k wel- 1
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