Aouta奥塔aart.一(个)；每一(个)；任一(个)n.英语字母表的第一个字母；学业成绩得优者；表示“最好”的符号a fragment of a song歌曲片断a subglacial deposit冰下沉积aortic root infusion主动脉根部灌注a basketful of fruit一篓水果a square of cloth.一块方布A leader or chief.首领，领导a shot of penicillin(注射的)一针青霉素Aortic valvuloplasty主动脉瓣瓣膜成形术a bottleneck channel狭长的水道a thank-you letter感谢信