1.by and by 不久以后
例句：By and by the ice in the river will melt.
河里的冰不久就会溶化。
2.get to know 了解，认识
例句：It should be fun. You'll get to know a lot of people.
一定会很好玩的。你还会结识很多人。
3.by any means 无论如何，总之
例句：We're not winning that battle yet by any means.
不管怎么说，我们还没有打胜这一仗。
4.by instinct 出于本能
例句：She appeared to know it by instinct.
她似乎凭着本能就认出了它。
5.by mail 邮寄，通过写信
例句：He made up the books into a parcel and sent it to his friend by mail.
他把书包成一包，邮给他的朋友。
6.by all means 一定，务必，尽一切办法
例句：I'll buy you an English reader by all means.
我一定给你买本英语读本。