back-of-the-envelope

US

UK

A1 初級
adj.形容詞粗略估計的
The engineer made a back-of-the-envelope calculation to estimate the project's cost.
adj.形容詞簡略分析的
Before committing to the investment, they did a back-of-the-envelope analysis to assess potential returns.
n. (c./u.)名詞 (可數/不可數)草算
We only need a back-of-the-envelope estimate to decide if the project is feasible.

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