adj.未尝败绩的，未败过的

He remains unbeaten in all his professional fights.
他在所有的职业比赛中都未尝败绩。
The team has an unbeaten record this season.
这个赛季该队保持着不败的记录。
The champion is unbeaten in the last three years.
这位冠军在过去三年中未曾败北。
Our school's football team is unbeaten so far this year.
我们学校的足球队今年目前为止还未输过一场。
The boxer is still unbeaten after twenty bouts.
这位拳击手在二十场比赛后仍然保持不败。
The undefeated boxer retired with an unbeaten record.
这位未尝败绩的拳击手带着不败的战绩退役了。
The undefeated team will face their toughest opponent yet.
这支不败之师将面对他们迄今为止最艰难的对手。
She holds an unbeaten record in her weight class.
她在自己的体重级别中保持着不败的记录。
The undefeated coach led his team to another victory.
这位未尝败绩的教练带领他的队伍取得了另一场胜利。
The unbeaten streak continued for the soccer team.
足球队的不败连胜仍在继续。