骑兵警察

例句：

1. 1. The cavalry charge was a turning point in the battle.
   骑兵冲锋是战斗中的一个转折点。
2. 2. The cavalry charges were so fast that they caught the enemy off guard.
   骑兵冲锋太快，让敌人措手不及。
3. 3. The cavalry unit was responsible for providing security at the border.
   骑兵单位负责边境的安全工作。