mechanical work
英 美
How about mechanical work?
那机械功怎么样呢？
Don we have to eat also for all the mechanical work that we do?
我们是不是也要吃掉，我们做的所有机械功呢？
This pressure then forces the piston back down producing mechanical work.
这种压力迫使活塞则回落生产机械工作。
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