one's bread and butter
01
the main source of a person or business's income
예시들
Once she establishes her bakery, she hopes it will become her bread and butter for the rest of her life.
bread-and-butter
01
기본적인, 필수적인
*** providing a basic means of subsistence
예시들
a bread-and-butter job
기본적인 일자리
02
일상적인, 기본적인
*** relating to people's practical, everyday needs and concerns
예시들
These are hardly the bread-and-butter concerns of struggling farmers.
이것은 어려움을 겪는 농민들의 기본적인 관심사가 아닙니다.



























