We were only able to make a rough estimate of how much fuel would be required.

我们只能对所需燃料的量作一个粗略估计。

《柯林斯英汉双解大词典》

We were only able to make a rough estimate of how much money would be required.

需要多少钱，我们只能做个大致的估计。

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The purpose of the WAG generator is to provide the estimator with a rough and ready estimate that may be accurate enough to make decisions in the absence of time consuming analysis.

WAG生成器的目的是为估算者提供一个粗略可用的估算，这估算在缺乏耗时分析时也许足够精确以做出决策了。

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