challenge for the ball

例句：

1. 1. The teamchallenged the opponent to a friendly match.
   队伍向对手发起了友好比赛的挑战。
2. 2. Thecoach challenged his players to improve their skills.
   教练要求队员们提高技能。
3. 3. Theathletes challenged each other toset new records.
   运动员们互相挑战，试图打破记录。