ballpark

英 ['bɔːlpɑːk] 美 ['bɔlpɑrk]

ballpark (n.): "baseball stadium," 1899, from (base)ball + park (n.). Figurative sense of "acceptable range of approximation" first recorded 1954, originally in the jargon of atomic weapons scientists, perhaps originally referring to area within which a missile was expected to return to earth; the reference is to broad but reasonably predictable dimensions.
The result, according to the author's estimate, is a stockpile equivalent to one billion tons of TNT. Assuming this estimate is "in the ball park," clearly there is valid reason for urging candor on the part of our government. [Ralph E. Lapp, "Atomic Candor," in "Bulletin of the Atomic Scientists," October 1954]

1. Ballpark estimates indicate a price tag of $90 million a month.: 大致的估计费用为每月9,000万美元。

2. This puts them in the ballpark and makes them a major player.: 这使他们得以参加其中并成为主要竞争者。

3. The offers for the contract were all in the same ballpark .: 本合同的所有开价均在同一范围内。

4. I can't give you anything more than just sort of a ballpark figure.: 我只能给你一个大概的数字。

5. As a general investigative agency, they're not in the same ballpark as the FBI.: 作为一个普通调查机构，他们还不足以同联邦调查局相提并论。