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关注：1
2013-05-23 12:21
求翻译：2，the internal combustion engine is a device used to convert the chemical energy of the fuel into heat energy, and then to convert this heat energy into usable mechanical energy, this is achieved by combining the appropriate amounts of air and fuel, and burning the mixture in an enclosed cylinder at a controlled rate ,是什么意思？ 待解决
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- 离问题结束还有
2，the internal combustion engine is a device used to convert the chemical energy of the fuel into heat energy, and then to convert this heat energy into usable mechanical energy, this is achieved by combining the appropriate amounts of air and fuel, and burning the mixture in an enclosed cylinder at a controlled rate ,
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