参考词典中simple machine的常规释义：
基本释义
参考例句
- The pulley is considered one of the five simple machines.
滑轮被认为是五种简单机械之一。 - Levers and pulleys are simple machines.
杠杆和滑轮是简单机械。
英英解释
- a device for overcoming resistance at one point by applying force at some other point
[同]
machine, simple machine
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