1. Don''t quarrel with your bread and butter.
    你可不要砸自己的饭碗。

2. bread and butter

2. Routine office work is my bread and butter.
    我靠日常的办公室工作谋生。

3.

3. He doesn''t just write for fun; writing is his bread and butter.
    他写作并不只是为了乐趣，那是他的谋生方式。

1. 生活必需品;衣、食和住,生计：be bound to do sth. 一定会..., 必然... | bread and butter 生活必需品; 衣、食和住, 生计 | have got to 必须, 不得不

2. 公共查询·英语单词大全

2. 面包抹黄油：抹黄油的面包 bread and butter | 面包抹黄油 bread and butter | 黄油面包 butter bread

3. 抹黄油的面包：无黄油烤面包片 dry toast | 抹黄油的面包 bread and butter | 面包抹黄油 bread and butter

1. 生计；谋生之道；主要收入来源
    Something that is the bread and butter of a person or organization is the activity or work that provides the main part of their income.

    e.g. The mobile phone business was actually his bread and butter.
           移动电话业务实际上是他的主业。

2. 最基本的；影响到大多数人的
    Bread and butter issues or matters are ones which are important to most people, because they affect them personally.

    e.g. The opposition gained support by concentrating on bread-and-butter matters.
           反对党关注与大多数人切身利益相关的问题，从而赢得了人们的支持。

1. the financial means whereby one lives

    e.g. each child was expected to pay for their keep
           he applied to the state for support
           he could no longer earn his own livelihood

    Synonym: supportkeeplivelihoodlivingsustenance