dutypaidadj.已纳税的dutyn.义务；职责；责任；税；关税duty-appointment职务聘任duty of government政府义务duty of good faith诚信义务duty of protecting救助义务duty actually paid实付税款duty horse-power报关马力duty of prevention预防义务duty factor action占空因数作用,工作系数作用duty-orientation任务导向duty-free policy免费政策