... power plant 动力厂(发电厂)... mechanical aid 机械辅助器 power 力量 ...
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a mechanical aid 机械辅助
mechanical teaching aid 机械教学辅助教具
mechanical calving aid 机械接生辅助设备
mechanical hearing aid 机械助听器
These aids would have been indispensable to very early people who would have found the process impossible without some form of mechanical aid.
远古人类会发现在缺少某种形式的机械辅助的情况下，这一过程是不可能实现的，这些辅助对他们来说不可或缺。
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Hurtling down a mountain on skis is the fastest a human being can travel on land without a mechanical aid.
ECONOMIST: R��gine Cavagnoud
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