big league
noun [ C ] UK informal uk/ˈbɪɡ ˌliːɡ/ us/ˈbɪɡ ˌliːɡ/
(US big leagues)（某运动，行业或运动的）顶级水平
the top level of a particular sport, business, or activity in which there is the greatest competition and the greatest opportunity for success
He is about to join the big league of Formula One in time for the new season. 他即将晋身世界一级方程式拉力赛，并将参加新赛季的比赛。
For the magazine to be successful, it will have to compete in the big league against leading weekly women's magazines. 为了成功，该杂志必须在高端市场和主流的女性周刊杂志竞争。
^big _leagues （尤指美国棒球）大联赛
in the US, a group of professional sports teams that compete at the highest level, especially in baseball