my time, my term
Monday, February 3, 2014
对人类历史的量化研究告诉我们什么？
http://mp.weixin.qq.com/mp/appmsg/show?__biz=MjM5OTc2NzA2MQ==&appmsgid=10002475&itemidx=5&sign=b600d1e391e3810dbfd55f2921ac2ddb&scene=2&from=timeline&isappinstalled=0#wechat_redirect
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