the most important league in any sport (especially baseball)
同义词：major league, big league, majors
big-league详细解释
big-league adj.（形容词）Sports Major-league.【体育运动】 职业体育总会的Informal Outstanding or influential in one`s field:【非正式用语】 第一流水平的选手：在某一领域杰出或最有影响的：例句：a big-league politician; one of the big-league banking institutions.杰出的政治家；有影响的金融学院之一
