即将离开知乎
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https://medium.com/backchannel/dennis-crowley-takes-another-stab-at-explaining-foursquare-a04894b7874b#.s17vld810
您即将离开知乎,请注意您的帐号和财产安全。
https://medium.com/backchannel/dennis-crowley-takes-another-stab-at-explaining-foursquare-a04894b7874b#.s17vld810