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關(guān)注：1
2013-05-23 12:21
求翻譯：Schmookler (1966) found that the proportion of firm patents increased from 19% in 1901是什么意思？ 待解決
 懸賞分：1
- 離問題結(jié)束還有
Schmookler (1966) found that the proportion of firm patents increased from 19% in 1901
問題補(bǔ)充： |
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