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关注：1
2013-05-23 12:21
求翻译：直到十九世纪初人们才知道热能是什么是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
直到十九世纪初人们才知道热能是什么
问题补充： |
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2013-05-23 12:21:38
Until the early nineteenth century that people know what the energy is
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2013-05-23 12:23:18
Until the early 19th century people did not know what is heat
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2013-05-23 12:24:58
Until the beginning of the 19th century the people only then knew the heat energy is any
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2013-05-23 12:26:38
Until the early 19th century before people know what heat is
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2013-05-23 12:28:18
正在翻译，请等待...
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