A/G血浆中清蛋与球蛋白之比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 bad thing never dies.坏事传千年。a very solid construction特别坚固的建筑物A dog wiggles his tail.狗摇尾巴。a book for small children幼儿读物a family of Notostraca.小型淡水甲壳纲动物的一科。a positive pregnancy test呈阳性反应的怀孕检测a fuzzy plan of action.内容不协调的行动计划a black-and-white tie黑白领结a ray/pool of sunlight一束/一片阳光a peculiar smell/taste奇怪的气味/味道