1. This theme recurs several times throughout the book. 这一主题在整部书里出现了好几次。
2. An episode of major depression may occur only once in a person's lifetime, but more often, it recurs throughout a person's life. 重度抑郁发作可能在一个人的一生中仅出现一次,但更经常的是,它在一个人的一生中反复出现。
3. Leap year recurs every four years. 每四年闰年一次。
4. A chance happens, but it never recurs. 只发生过一次,但是没再复发过。
5. This festival recurs every five years. 这个节庆每五年举行一次。