我们需密切关注这项工程

We need to keep a close eye on this project

他与那所大学建立了密切的联系。

He developed a close association with the university.

学院和许多其他机构有密切关联。

The college has close links with many other institutions.

大楼门卫长和接待处配合密切。

The head porter works in close liaison with the reception office.

我一直在密切关注这项讨论。

I've been following this discussion closely.