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关注：1
2013-05-23 12:21
求翻译：这项发明为道路安全做出了重大贡献是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
这项发明为道路安全做出了重大贡献
问题补充： |
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2013-05-23 12:21:38
This invention made a significant contribution to road safety
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2013-05-23 12:23:18
This invention is road safety have made a significant contribution
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2013-05-23 12:24:58
This invention has made the significant contribution for the road safety
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2013-05-23 12:26:38
This invention made a major contribution to road safety
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2013-05-23 12:28:18
His English result
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