1、So how do you prove your readiness for the big leagues? By thinking like a big-league player.
那么，你如何證明自己已經(jīng)準備好進入高層了呢？

2、It was nerve-racking to be in a big-league park.
到一個設施一流的公園真讓人緊張。

3、Jack is a big-league pitcher
杰克是一支一流（棒球）隊的投手。

big-league翻譯