The typical screen is a relatively simple machine to operate.

典型的筛子是一种操作相对简单的机械设备.

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Safeguard from simple machine oneself can make more sophisticated shoemaking machine now.

从简单的机器维护到现在自己能制造较复杂的制鞋机器.

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Lever: Simple machine used to amplify physical force.

杠杆: 用来增大力量的简单机械.

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The inclined plane is a simple machine.

斜面是一种简易的机器.

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He can mend a simple machine.

他会修简单的机器.

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The lever is a common simple machine.

杠杆是普遍的简易器械.

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This is a simple machine.

这是一台简易机器.

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The pulley is a simple machine.

滑轮是一种简易机械.

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