noun [C] 1 any game played with a ball 球类运动
2 (US 美) a baseball match 棒球比赛
a (whole) new/different ball game something completely new or different 一番（完全）不同的新境况:
I'm used to working outside, so sitting in an office all day is a whole new ball game for me. 我习惯于户外工作，因此整天坐在办公室里是一番完全不同的新境况。