维持者

例句：

1. 1. The team's captain is a key maintainer of the team's morale.
   队长是团队士气的关键维护者。
2. 2. The old man was a skilled maintainer of his garden.
   老人擅长维护他的花园。
3. 3. The new manager has been tasked with maintaining the company's financial stability.
   新任经理被指派负责维护公司的财务稳定。