The player is undefeated in the field of wrestling.

这个运动员在摔跤领域上未尝败绩。

It's not easy to keep undefeated.

要保持全胜是很不容易的。

She was undefeated for 13 years.

她曾十三年未被战胜过。

They are undefeated in 13 games.

他们13场比赛未被打败过。

I'd like to fight him because he's undefeated and I want to be the first man to beat him.

我想跟他比赛拳击，因为他从未被打败过，而我想成为第一个战胜他的人。

Both teams were undefeated.

两个球队都没输过。

I would like you to be undefeated DE.

我愿大家做个不败者。