A pulley is a wheel with a groove that a rope or chain runs over, used to lift heavy things more easily. You pull the rope, the wheel turns, and the load comes up.

A pulley所謂pulley滑輪 is a wheel with a groove是一個有溝槽的輪子 that a rope or chain runs over繩子或鏈條會繞過那個溝槽 used to lift heavy things more easily用來讓人更輕鬆地把重物拉起來 You pull the rope你拉繩子 the wheel turns輪子就會轉動 and the load comes up重物就會被拉上來

Several pulleys together — a block and tackle — let you lift more than you could with your arms alone. Ships, building sites, gym machines, and physics class all use them.

Several pulleys together好幾個滑輪組合在一起 a block and tackle也就是所謂的複滑車 let you lift more能讓你舉起更多重量 than you could with your arms alone比你單靠手臂能舉的還多 Ships, building sites, gym machines, and physics class all use them船隻、工地、健身房的機器，還有物理課，都會用到它

You can also pulley something as a verb, though the noun is far more common.

You can also pulley something as a verb這個字也可以當動詞用 though the noun is far more common不過名詞的用法常見得多

It looks as if it must come from pull, and people have long thought so, because that is what you do with the rope. Though actually, that is a folk story. The word came from Old French poulie, from a medieval Latin form of Greek polídion, “little pivot,” a diminutive of pólos, a pivot, hinge, or axis — the same Greek idea as the earth’s poles. The pull in your hands and the pull in the spelling just happened to meet.

It looks as if it must come from pull這個字看起來好像一定是從pull（拉）來的 and people have long thought so大家長久以來也都這麼認為 because that is what you do with the rope因為你對繩子做的動作就是拉 Though actually不過其實 that is a folk story這只是個民間說法 The word came from Old French poulie這個字其實來自古法文poulie from a medieval Latin form再往前是中世紀拉丁文的一種形式 of Greek polídion, "little pivot,"源自希臘文polídion，意思是「小樞軸」 a diminutive of pólos, a pivot, hinge, or axis是pólos（樞軸、鉸鏈，或軸）的小稱 the same Greek idea as the earth's poles跟地球的兩極poles是同一個希臘字根 The pull in your hands你手上拉的動作pull and the pull in the spelling跟拼字裡的pull just happened to meet只是剛好碰在一起而已