We can also use "gauge" to mean estimate.

我们也可以用“gauge”来表示估计。

A ballpark estimate, however, is a term that means a rough estimate - an approximate guess at something.

然而，粗略估计是一个术语， 意思是粗略估计 - 对某事的近似猜测。

Someone says, " Well, I'm not really exactly sure how much, " and you say, " Well, give me a ballpark figure" – that means an estimate, a guess.

有人说，“好吧，我真的不确定有多少， ” 然后你说，“好吧，给我一个大概的数字”——这意味着一个估计， 一个猜测。