据斯坦福出版社报导，乔丹发现他的一些朋友在阅读了Facebook上的他人的帖子后变得心烦意乱。
Jordan noticed that some of his friends became "upset after reading others' posts on Facebook," according to a Stanford press release.
贺凯：《1850年前之中国简史》，斯坦福：斯坦福大学出版社，1978年。
Hucker, Charles O. China to 1850: a short History. Stanford: Satanford University Press, 1978.
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