maintenance of original nature

例句：

1. 1. The car needs regular maintenance to keep it in good condition.
   这辆车需要定期维护，以保持良好状态。
2. 2. The team's performance has been maintained despite the loss of key players.
   尽管失去了关键球员，但团队的表现仍然得到了保持。
3. 3. The company is committed to maintaining its high standards of quality and service.
   公司致力于保持其高质量和优质服务的标准。