back-of-the-envelope calculation
复数形式
back-of-the-envelope calculations
1
快速计算, 粗略估计
a rough estimate or calculation done quickly and informally, often using basic methods or assumptions
The idiom "back-of-the-envelope calculation" originates from a common practice in which people perform quick calculations or estimations on the back of an envelope or a scrap of paper when they don't have access to a calculator or formal tools. This practice is often associated with simplicity, informality, and rough estimations. This idiomatic phrase is used to describe a rough, simplified, or quick estimation or calculation, typically done without using precise data or detailed analysis.
- I don't need the exact amount.Just give me a back-of-the-envelope calculation.
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。
- The engineer made a back-of-the-envelope calculation to determine the approximate load-bearing capacity of the bridge.
工程师做了一个粗略计算来确定桥梁的大致承载能力。
- Before making a final decision, they performed some back-of-the-envelope calculations to assess the financial feasibility.
在做出最终决定之前，他们进行了一些粗略计算以评估财务可行性。
- The manager used a back-of-the-envelope calculation to gauge the potential return on investment.
经理用粗略计算来评估潜在的投资回报。