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关注：1
2013-05-23 12:21
求翻译：用于实验的动物数量在过去二十年中已大大减少了。是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
用于实验的动物数量在过去二十年中已大大减少了。
问题补充： |
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2013-05-23 12:21:38
The number of animals used in experiments over the past two decades has been greatly reduced.
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2013-05-23 12:23:18
The number of animals used in experiments in the past 20 years has been greatly reduced.
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2013-05-23 12:24:58
Uses in the animal quantity which tests in the past 20 years reducing greatly.
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2013-05-23 12:26:38
For experiment of animal numbers has far fewer past 20 years.
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2013-05-23 12:28:18
Number of animals used in experiments have been greatly reduced over the past 20 years.
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