replacer

例句：

1. 1. The new manager is a good substitute for the absent manager.
   新经理是一个很好的缺席经理的替代者。
2. 2. He replaced the old machine with a more efficient one.
   他用一个更高效的机器替换了旧的机器。
3. 3.She was asked to replace her colleague as the team leader.
   她被要求接替她的同伴，成为团队领导。