Major League Baseball
/ˌmeɪdʒə liːɡ ˈbeɪsbɔːl/
/ˌmeɪdʒər liːɡ ˈbeɪsbɔːl/
(abbreviation MLB)
- the highest level of professional baseball in the US. Major League Baseball is also the organization which operates the two baseball leagues, the National League and the American League. World Series™
美国最高水平的职业棒球。美国职业棒球大联盟也是运营两个棒球联盟（国家联盟和美国联盟）的组织。世界大赛™