on the bench
1．sitting in a law court as a judge 当法官；主持审判
Judge Abbot will be on the bench this morning．艾伯特法官今天上午将主持开庭。
2． sitting among the substitute players坐冷板凳；当后备队员
The coach had to keep his star player on the bench with a sprained ankle．教练只好让他那名扭伤了踝骨的主力队员在场外候补。