a bas打倒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 general's adjutanta son of the morningn.趁早赶路的人a ragged performance不完美的表演a hereditary disease遗传病A candid snapshot.一张偷拍的快照a practical approach切合实际的办法A tunnel-digger.隧道掘。a tube of toothpaste一管牙膏a student of Harvarda prior distribution事前分布