uty-free
adj, adv (of goods) that can be imported without payment of customs duties (指货物)免关税(的)
You´re allowed 1 litres of spirits duty-free. 你可免税带进1升烈性酒.
There´s a good duty-free shop (ie one selling such goods) on the ferry. 渡船上有个挺不错的免税商店.
buy cigarettes duty-free 买免税香烟.