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back-of-the-envelope calculation
/bˈækʌvðɪˈɑːnvəlˌoʊp kˌælkjʊlˈeɪʃən/
/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
Example
I do n't need the exact amount.
我不需要确切的数额。只要给我一个粗略的计算。
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。
