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单词 pulley
释义

pulley

noun
/ˈpʊli/
/ˈpʊli/
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  1. enlarge image
    a wheel or set of wheels over which a rope or chain is pulled in order to lift or lower heavy objects
    • a system of ropes and pulleys
    • The scenery was moved across the stage by ropes and pulleys.
    • a system of chains passing over pulleys
    Word OriginMiddle English: from Old French polie, probably from a medieval Greek diminutive of polos ‘pivot, axis’.
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更新时间:2024/11/10 19:09:59