undefeated [ˌʌndɪ'fi:tɪd]

例句:

• The two London clubs are the only undefeated teams in the division.
  这两家伦敦的俱乐部是该级别里仅存的保持不败的球队。
  
• She was undefeated for 13 years.
  她13年保持不败。
  
• They are undefeated in 13 games.
  他们13场比赛未被打败过。
  
• Brilliant, moving and unmissable Undefeated shouldn't work.
  来自THETIMES
• Whatever was thrown at him, Frankel has remained undefeated.
  来自BBC
• The Tigers were undefeated, and had a chance to become the No.
  来自NEWYORKER