44, a few, 有些，几个
45, as a matter of fact, 实际情况，真相
46, a little, 一点，稍微，一些，少许
47, by accident , 偶然
48, by far , 最,...得多
49, by itself , 自动地,独自地
50, by means of , 用,依靠
51, by mistake , 错误地,无意地
52, by no means , 决不,并没有
53, by oneself , 单独地,独自地
54, by the way , 顺便说说
55, by way of , 经由,通过...方法
56, for the present , 暂时,目前
57, for the sake of , 为了,为了...的利益
58, for the time being , 暂时,眼下
59, back and forth , 来回地,反复地
60, before long , 不久以后
61, begin with, 从开
62, break off, 断绝，结束
63, break up, 中止，结束;打碎，折断
64, break into, 闯入
65, break through, 突破
66, bring down, 打倒，挫伤;降低
67, bringforward, 提出
68, bring up, 教育，培养，使成长
69, credit card, 信用卡
70, due to , 由于,因为
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