动词occur第三人称单数形式
It occurs to me that he might be interested in the problem we had discussed. 我想起来了他也许对我们讨论过的那个问题感兴趣。
The point at which this termination occurs. 停烧时刻这种时期发生的时刻
One of the funniest episodes in the book occurs in chapter 6. 书中最有趣的情节是在第6章。