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关注：1
2013-05-23 12:21
求翻译：在过去的二十年中，用于科学实验的动物数量大大减少了。是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
在过去的二十年中，用于科学实验的动物数量大大减少了。
问题补充： |
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2013-05-23 12:21:38
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2013-05-23 12:23:18
In the past 20 years, the number of animals used for scientific experiments has been greatly reduced.
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2013-05-23 12:24:58
In the past 20 years, used in the scientific experiment animal quantity reducing greatly.
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2013-05-23 12:26:38
In the past 20 years, greatly reduces the number of animals used for scientific experiments.
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2013-05-23 12:28:18
In the past two decades, the number of animals used for scientific experiments greatly reduced.
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