back-of-the-envelope calculation
/bˈakɒvðɪˈɛnvəlˌəʊp kˌalkjʊlˈeɪʃən/
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
Idiom
Informal
例子
We did some back-of-the-envelope calculations to estimate the cost of the project.
我们做了一些粗略计算来估算项目的成本。
