(46) beside the point 离题，不中肯，不相干的；无关紧要
(47) beyond question 毫无疑问，确定无疑
(48) by accident 偶然
(49) by air 坐飞机
(50) by all means 尽一切办法；一定，务必
(51) by chance 偶然；意外地，碰巧
(52) by means of 用，依靠
(53) by mistake 错误地，无意中(做了某件错事)
(54) by no means 绝不，并没有
(55) by reason of 由于，因为
(56) by the way 顺便地；附带说说
(57) by/in virtue of 依靠……(的力量)；由于
(58) by way of 通过……方法／形式；经过，经由
(59) for ever 永远；永久地
(60) for good 永久地；永远地
(61) for instance 例如，比如
(62) for the better 好转，向好的方向发展
(63) for the moment/present 暂时；目前
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