challenger
柯林斯词典
1. N-COUNT A challenger is someone who competes with you for a position or title that you already have, for example being a sports champion or a political leader. 挑战者
The strongest challenger, Texas Democrat Martin Frost, has withdrawn from the race. 最强劲的挑战者，德克萨斯州的民主党人马丁·弗罗斯特已经退出了竞选。
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challenger /ˈtʃælɪndʒə/ (challengers)
剑桥词典
- someone who tries to win a competition , fight , or sports event from someone who has previously won it
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