Back-of-the-envelope calculation
01
快速计算, 粗略估计
a rough estimate or calculation done quickly and informally, often using basic methods or assumptions
习语
非正式
语法信息
有生性状态
抽象
形态构成
复杂复合词
可数
复数形式
back-of-the-envelope calculations
例子
A back-of-the-envelope calculation shows that we cannot afford the new office.
我不需要确切的数额。只要给我一个粗略的计算。
