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关注：1
2013-05-23 12:21
求翻译：经过多年科技攻关是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
经过多年科技攻关
问题补充： |
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2013-05-23 12:21:38
After years of scientific and technological
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2013-05-23 12:23:18
Pass by science and technology of many years offends the pass
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2013-05-23 12:24:58
After many year technical attack
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2013-05-23 12:26:38
After many years of scientific and technological research
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2013-05-23 12:28:18
After many years of scientific and technological research
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