The pulley is considered one of the five simple machines 滑轮被认为是五种简单机械之一。
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Specification for mechanical experimental box of primary school 小学简单机械实验盒技术条件
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Levers and pulleys are simple machines 杠杆和滑轮是简单机械。
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Such a complex machine as the diesel engine is simply a combination of simple machines 象柴油机那样复杂的机器只不过是简单机械的组合。
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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
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Children will learn about science as they enjoy experimenting with simple machines , soap bubbles , electrical circuits , home appliances and a 22 - metre - high 72 feet energy machine , the largest of its kind 他们可以透过参与有趣的实验，如操控简单机械弄弄肥皂泡接连电路检视家庭电器观看能量穿梭机的运作等，去学习科学新知。
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Her hands began to ache at the wrists and then in the fingers , and towards the last she seemed one mass of dull , complaining muscles , fixed in an eternal position and performing a single mechanical movement which became more and more distasteful , until as last it was absolutely nauseating 她的手腕开始酸痛，接着手指也痛了，后来全身都麻木酸痛了。她这样姿势不变地重复做着这简单机械的动作，这些动作变得越来越叫人讨厌，到最后，简直让人恶心。
