Although the tax on cigarettes has doubled in the past two years, sales are still going up.尽管过去两年来对香烟的征税提高了一倍，香烟的销售仍在增加。The government is threatening to double the tax on alcohol.政府威胁要把酒税提高一倍。The customs duty on luxury cars went up last month.上月豪华汽车的关税提高了。