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關注：1
2013-05-23 12:21
求翻譯：經濟學家無法在實驗室做受控實驗，他們只能依靠自然試驗是什么意思？ 待解決
 懸賞分：1
- 離問題結束還有
經濟學家無法在實驗室做受控實驗，他們只能依靠自然試驗
問題補充： |
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2013-05-23 12:21:38
Economists can not do controlled experiments in the laboratory, they can only rely on the natural experiment
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2013-05-23 12:23:18
Economists do not in the lab to do a controlled experiment, they can only rely on natural test
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2013-05-23 12:24:58
The economist is unable in the laboratory to do the controlled experiment, they only can depend upon the nature experiment
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2013-05-23 12:26:38
Economists can't do controlled experiments in a laboratory, they can only rely on natural experiments
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2013-05-23 12:28:18
正在翻譯，請等待...
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