ANRPCn.天然橡胶生产国协会anart.（用在元音音素前）一an overcoat lined with silk衬有绸里儿的大衣an underground organization地下组织an outline of world history世界史大纲an exocyclic double bond.环外的一对化学键angionyolipoma/pathology血管肌脂瘤／病理学anesthetic steroid compound麻醉性甾族化合物an electric industry worker电业工人an official par of exchange法定汇兑平价anechoic frequency response无回声频率响应an honours degree/course荣誉学位/课程