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关注：1
2013-05-23 12:21
求翻译：周期律还指导了对元素及其化合物性质的系统研究是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
周期律还指导了对元素及其化合物性质的系统研究
问题补充： |
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2013-05-23 12:21:38
The cycle also guided the study of properties of elements and their compounds
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2013-05-23 12:23:18
Periodic law has also guided the nature of elements and their compounds the system research
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2013-05-23 12:24:58
The cyclical law has also instructed to the element and the chemical combination natural archery target system research
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2013-05-23 12:26:38
The cycle also guided the study of properties of elements and their compounds
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2013-05-23 12:28:18
The cycle also guided the study of properties of elements and their compounds
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