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pulley

noun
/ˈpʊli/
/ˈpʊli/
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  1. a wheel or set of wheels over which a rope or chain is pulled in order to lift or lower heavy objects滑轮;滑轮组;滑车
    • a system of ropes and pulleys绳索滑轮系统
    • The scenery was moved across the stage by ropes and pulleys.布景被绳子和滑轮移过舞台。
    • a system of chains passing over pulleys穿过滑轮的链条系统
    Word OriginMiddle English: from Old French polie, probably from a medieval Greek diminutive of polos ‘pivot, axis’.

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