double price system ; dual price system ; two-tier price system
黄金双重价格制度 two-time gold price system
双重价格制度 double price system
在我写那本书的时候，中国还实行着双重价格制，在机票、火车票、旅游景点门票等方面，外国人要比中国人付的多得多。
At the time I published my book, there was still a dual pricing system whereby foreigners paid much more than Chinese for airline and train tickets, entry to tourist sites, and the like.
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