Aa (great) number of 许多;大量的accent n.口音;腔调;重音active adj.积极的;活跃的actually adv.实际上;事实上AD 公元add up 合计African adj.非洲的;非洲人的;非洲语言的altitude n.海拔高度;高处anti-black adj.反黑人的apartment n.美公寓住宅;单元住宅as a matter of fact 事实上as if 仿佛;好像as usual 照常at an end 结束;终结at present 现在;目前atlas n.地图;地图集attack vt.进攻;攻击;抨击attitude n.态度;看法abacus n.算盘above all 最重要;首先according to 按照;根据所说actor n.男演员;行动者addition n.加;增加;加法 in addition 另外;也admit vt.& vi.容许;承认;接纳adverti