补缺者

例句：

1. 1. The company needs a good manager to fill the gaps in its operations.
   公司需要一个优秀的经理来填补其运营中的空缺。
2. 2. The teacher provided additional resources to help students catch up on their work.
   老师提供了额外的资源，帮助学生赶上他们的工作进度。
3. 3. The project team was shorthanded due to several key members being absent.
   由于几个关键成员缺席，项目团队人手不足。