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http://www.aei-ideas.org/2013/09/chart-of-the-day-rising-household-vehicle-ownership-over-time-belies-middle-class-stagnation/
您即将离开知乎,请注意您的帐号和财产安全。
http://www.aei-ideas.org/2013/09/chart-of-the-day-rising-household-vehicle-ownership-over-time-belies-middle-class-stagnation/