【法】 子女赡养父母的责任

duty free

duty-free

on duty

heavies【车辆】;heavy vehicle【车辆】;heavy-duty vehicle【车辆】

absence without leave【劳经】;unauthorized departure from official duty【劳经】

duty factor【电子】

heavy-duty plastic packing tape making machine

duty-paid price【物】价;price for tax assessment【物】价