中国人口比美国多3倍, 撤稿数比美多74%, 按人口比例, 美国的撤稿率是远高于中国的。

来源: 清源白水于 2023-07-28 19:15:47 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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