simple machine
英
美
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Noun:
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a device for overcoming resistance at one point by applying force at some other point
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用作名词 (n.)
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Levers and pulleys are simple machines.
杠杆和滑轮是简单机械。
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We used the digital camera to take a short movie clip of our simple machine in action.
我们使用数码相机拍摄了运转中的简单机械的简短电影剪辑。
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