rule of thumb

含义

a rough practical guide based on experience

凭经验得出的粗略准则.

例句

1. 1As a rule of thumb, one cup of rice feeds two people.
2. 2A good rule of thumb is to save a tenth of every pay cheque.
3. 3My rule of thumb is simple: if I haven't worn something for a year, I give it away.
4. 4The builder used a rule of thumb to work out how much paint we would need.
5. 5Is there a rule of thumb for how long to leave bread dough to rise?

语法

可数名词：a rule of thumb、as a rule of thumb。各词之间不能插入其他词。