什么是 challenger？ challenger是aspirant
什么是 aspirant？
- One that challenges: a challenger of established authority.
Un repte: un aspirant a l'autoritat establerta.
- Sports One who competes against the holder of a title or championship, as in boxing.
Esport Aquell que competeix contra el posseïdor d'un títol o campionat, com en la boxa.