bread and butter

谋生的职业；谋生之道；饭碗

He's a mechanic and fixing cars is his bread and butter.

他是修车工，这是他的饭碗。

whole wheat bread

全麦面包

I prefer whole wheat to white bread.

比如白面包，我更喜欢全麦面包。

breadwinner n.

养家糊口的人

After the divorce, she's the only breadwinner in the family.

离婚后，她是家里唯一养家糊口的人。

butter someone up

奉承，拍马屁

He's always buttering up the boss.People don't like him.

他一直在拍老板马屁。大家都不喜欢他。

flatter v. 奉承；讨好

I'm flattered.

我感到很荣幸。