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https://www.quora.com/What-are-some-areas-The-Economist-covers-but-not-many-people-are-aware-of/answer/Tom-Standage
您即将离开知乎,请注意您的帐号和财产安全。
https://www.quora.com/What-are-some-areas-The-Economist-covers-but-not-many-people-are-aware-of/answer/Tom-Standage