2）gap：n.缺口；间隔；分歧|the gap between rich and poor 贫富差距。

【例句】

How do you fill the gaps in your expertise?

如何弥补你在专门技术方面的缺口?

This new study attempts to fill the gap in an area that has been neglected.

这项新研究试图填补这一领域一直被忽略的空白。