Definition: to happen again or many times Level: C2
相似的主题在他的多部小说中反复出现。
Similar themes ___recur in many of his novels.
在电影的关键时刻，一种不安感会反复出现。
A sense of unease ___recurs at key moments in the film.
如果该问题再次发生，请立即联系技术支持。
If the problem ___recurs, please contact technical support immediately.
