B 开头单词

by marriage 与婚姻有关的

by many accounts 在很多人看来

by mail 邮寄；通过写信，通过邮递；按信件

by machine

by lysis 转轻期

by lumbar [医药科学]腰椎给药

by lucky coincidence 机缘巧合 碰巧

by luck 侥幸地

by love possessed

by line

by light

by letter 以书信形式

by leaps and bounds adv. 飞跃地，突飞猛进地

by law n. 根据法律，在法律上；附则

by land 由陆路

by lack of 因没有...；因缺乏...

by jove 天啊（非正式，表示惊讶或强调）

by jingo

by itself 单独地；自动地

by itsef 独自地；自动地