Interest or boredom, and understanding or misunderstanding.

感兴趣或是无聊，和理解与误解。

youdao

Leaning back in one's seat and yawning at a talk or lecture shows lack of interest, boredom.

一边倒回到自己的座位和打哈欠在一次谈话或演讲，显示缺乏兴趣，解闷。

youdao

Eye contact is sometimes the key to communication. It can signal friendliness or hostility, interest or boredom, and understanding or confusion.

有时候，眼神接触是交流的关键。它可以成为表达友好或敌意，感兴趣或者不耐烦，理解或者困惑的信号。

youdao

The quest for the constantly new was driven by a lightning-quick mind and short attention span for anything that failed to interest him, the fear of boredom, and an insatiable need for intellectual stimulation.

WSJ: Philip Johnson: Short of Attention Span, Long on Aesthetics