a

art.一(个)；每一(个)

a (large) number of, a bill of fare, a bit, a case in point, a couple of, a far cry, a few, a fifth column, a fortiori, a gentleman's agreement, a good deal, a good few, a good many, a great deal, a great deal of, a great many, a great/good deal of, a hard nut to crack, a kind of, a la carte,