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关注：1
2013-05-23 12:21
求翻译：在1945年之前，人类在能源利用领域只涉及到物理变化和化学变化。是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
在1945年之前，人类在能源利用领域只涉及到物理变化和化学变化。
问题补充： |
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2013-05-23 12:21:38
In 1945, before the field of human energy use is only related to physical changes and chemical changes.
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2013-05-23 12:23:18
In 1945, before mankind field in the energy use involved only changes in the physical and chemical changes.
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2013-05-23 12:24:58
Before 1945, the humanity only involves in the energy using the domain to the physical change and the chemical change.
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2013-05-23 12:26:38
Before 1945, humans only involves physical changes and chemical changes in the field of energy use.
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2013-05-23 12:28:18
Before 1945, the humanity only involves in the energy using the domain to the physical change and the chemical change.
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