密切合作

例句：

1. 1. The team worked closely together to achieve the goal.
   团队紧密合作以实现目标。
2. 2. They collaborated closely to solve the problem.
   他们紧密合作来解决问题。
3. 3. In a close-knit community, everyone works closely together.
   在一个团结的社区里，每个人都紧密合作。