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关注：1
2013-05-23 12:21
求翻译：detailed results indicate important differences in country origins and in technology fields. For example, the parameter estimates in the cases of the U.S., Japan, the E.U. and other patent source countries are all positive, which suggests that the value of patents是什么意思？ 待解决
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- 离问题结束还有
detailed results indicate important differences in country origins and in technology fields. For example, the parameter estimates in the cases of the U.S., Japan, the E.U. and other patent source countries are all positive, which suggests that the value of patents
问题补充： |
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