build up 逐步建立
burn down 把…夷为平地
burn oneself out (因过劳而)筋疲力尽
burn out 烧坏;烧尽,筋疲力尽
burn up (炉火等)烧旺起来
burst into 闯入;突然发作
burst into laughter 突然笑起来
burst out laughing 突然笑起来
burst up 爆炸;失败;突然发怒
burst upon 突然来到
bus station n公共汽车站
bus stop n。公共汽车站
but for 倘没有,要不是
button up 扣,扣紧钮扣
buy off 收买
buy out 出钱使(某人)放弃地位
buy up 全买;尽可能买进
buzz off (俚)急忙离去
by accident 偶然
by air (bus,train,ship)乘飞机(公共汽车,火车,轮船)by all means 尽一切办法;一定
by all nerves 高度不安,神经紧张
by and by 不久以后,逐渐地