关税

customs duty;tariff （一个国家海关按照国家规定对进出国境或关境的货物或物品征收的一种税）
免征～ exempt sb from customs duties; be duty-free/报复性～ retaliatory tariff/保护～protective tariff/高峰～ tariff peak/单独～地区separate customs territory/～保证制度system of customs security/～地区tariff area/～豁免exemption from customs duties/～合作customs cooperation/～减让表schedule of tariff concessions/～普遍优惠制（关税普惠制）General Preferential Duties/～上限tariff ceilings/～调升tariff escalation/～特惠制preferential tariff system/～退税duty drawback/～优惠tariff preference /～约束tariff binding /～战tariff war /～制度customs regime; system of customs duties/ ～自主tariff autonomy/～最高限额tariff ceiling