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。

youdao

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。

youdao