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關注：1
2013-05-23 12:21
求翻譯：an internal combustion engine is able to achieve a relatively high operating efficiency by generating the input heat within the engine itself是什么意思？ 待解決
 懸賞分：1
- 離問題結束還有
an internal combustion engine is able to achieve a relatively high operating efficiency by generating the input heat within the engine itself
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