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关注：1
2013-05-23 12:21
求翻译：科学家花了三十年的时间才研制出这种药。是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
科学家花了三十年的时间才研制出这种药。
问题补充： |
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2013-05-23 12:21:38
Scientists spent three decades to the development of this drug.
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2013-05-23 12:23:18
Scientists have spent 30 hours of this medicine was developed.
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2013-05-23 12:24:58
The scientist spent 30 years only then to develop this medicine.
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2013-05-23 12:26:38
Scientists took 30 years to develop this medicine.
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2013-05-23 12:28:18
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