| 释义 |
●a rule of ˈthumba quick, practical, but not exact, way of measuring or calculating sth 快速实用的估算方法；根据经验进行的粗算◆As a rule of thumb you need a litre of paint to every 12 square metres of wall.
根据经验粗算一下，每 12 平方米墙面需要一升涂料。 ORIGIN This phrase may come from the fact that people often used their thumbs to estimate measurements. 这个习语源于过去用拇指估测的做法。 |