by accident 偶然
by all means 尽一切方法，必须
by and by 不久，早晚
by chance 偶然，可巧
by far ……得多;最多
by means of 用，仰仗
by mistake 过错地，无意中(做错了某事)
by no means 决不，绝没有
by oneself 单独地，单独地
by the way 趁便地，趁便说说
by way of 通过，经由;通过……的方法
learn by heart 记住，背诵
little by little 一点一点地，逐渐地
side by side 肩并肩地，一起
