门和门框之间有一条小缝隙。

There's a small ___gap between the door and its frame.

我们需要缩小城乡之间的教育差距。

We need to bridge the ___gap in education between urban and rural areas.

停电造成了我们工作流程的中断。

The power outage caused a ___gap in our workflow.

我们的知识体系中存在一些需要填补的空白。

There are some important ___gaps in our knowledge that need to be filled.