by and by

before long; eventually

不久；最终

by the by (或 bye)

incidentally; parenthetically

顺便提一句；插上一句

where's Hector, by the by?.

顺便问一句，赫克托在哪？。

by and large

on the whole; everything considered

总的说来；大体上

mammals have, by and large, bigger brains than reptiles.

总的说来，哺乳动物的脑比爬行动物大。

by oneself

alone

单独地

living in Farley Court by himself.

他独自住在法利大楼。

unaided

独自地

the patient often learns to undress by himself.

病人常要学习自己脱衣服。

by way of

the patient often learns to undress by himself.

病人常要学习自己脱衣服。