Defines mechanical devices, such as levers and pulleys, as simple machines that can alter the magnitude or direction of an applied force.
定义了机械装置，如杠杆、滑轮等简单机械，它们可以改变作用力的大小或方向。
| Expression | 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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| Meaning | 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. |
| Reading | jīxiè zhuāngzhì yī gè jiǎndān zhuāngzhì rú gànggǎn huálún huò xiémiàn páo kěyǐ gǎibiàn zuòyònglì de dàxiǎo huò fāngxiàng huò tóngshí gǎibiàn jiǎndān jīxiè zhuāngzhì |
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