because, baby, base, basket, bug, but, buy, background, boy, bee, big, band, bye, bet, box, ball, babble, blue, bird, birth, book, busy, byte, bus
bady n. 婴儿;婴孩
back adv.向后;回到;返回
backbackground n.背景;后景
bad adj.坏的;不好的
bag n.包，书包
ball n.球;球类游戏
ballon n.气球
bamboo n.竹子
banana n.香蕉
band n.乐队
bank n.银行
