The buzzword these days is communication.

【翻译】现如今的流行词是“沟通”。

从“主系表”结构可以看出，这是一个“概念释义”的句子。

1. buzzword 是个“合成词”：buzz + word。

意为：（媒体上的）时髦术语，流行行话

A buzzword is a word or expression that has become fashionable in a particular field and is being used a lot by the media.

2. buzz 是个形容词，意为：（词语、想法或活动）时髦的

You can use buzz to refer to a word, idea, or activity which has recently become extremely popular.

Sex education in schools was the buzz topic. 

性教育在学校是个热议话题。