在每个城市，都制定了一个测试香烟的清单，并在3个不同的零售店分别购买清单上每种品牌的香烟各一条。
In each city, a list of target brands was created and one carton of each brand was purchased at each of three distinct retail locations.
在每个城市，都制定了一个测试香烟的清单，并在3个不同的零售店分别购买清单上每种品牌的香烟各一条。
In each city, a list of target brands was created and one carton of each brand was purchased at each of three distinct retail locations.
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