I can give you a rough estimate of the amount of wood you will need.

我可以粗略估计一下你所需要的木材量。

《牛津词典》

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》

As a rough estimate, Nigeria is three times the size of Great Britain.

粗略估计,尼日利亚是大不列颠的三倍大。

youdao

But, remember, this is a very rough estimate.

但，记住，这只是一些粗糙的计算估计。

麻省理工公开课 - 固态化学导论课程节选

Now, mind you, this is all a rough estimate and this statistic is very, very noisy.

FORBES: Analyzing The Weekly Petroleum Status Report

At that size, a very rough estimate tells us Kong could weigh as much as 60 tons.

FORBES: King Kong Vs. T. Rex

That's the rough estimate of what I think people have been using both here and at the Pentagon.

WHITEHOUSE: Press Briefing