substitutional atom

例句：

1. 1.The new manager was a substitue for the old one.
   新经理是老经理的替代者。
2. 2. He is a substitute for a teammate who is injured.
   他是一名受伤队友的替补。
3. 3. The substitute player performed well in the game.
   替补球员在比赛中表现良好。