1、 The accident occurred at five o'clock、事故发生在五点钟。
2、 It never occurred to me that he might be in trouble、我怎么也没有想到他会遇上麻烦。
3、 An idea occurred to me、我想到一个主意。
4、 Do giraffes occur in Africa only?长颈鹿是不是只在非洲才有？
5、 occur
6、 Earthquakes occur frequently in this area、这一地区经常发生地震。