occur的例句

occur 的相关例句:

31.	Such cases not infrequently occur [crop up].
	这类事情屡有发生。
32.	I shall take care it does not occur again.
	我一定注意不让它再次发生。
33.	Food shortages often occur in time of war.
	在战争时期常常发生粮食短缺的情形。
34.	occur at irregular intervals
	不定期发生
35.	fall out happen; occur
	发生
36.	occur at fixed periods
	定期发生
37.	frequently occur
	经常发生
38.	occur sporadically
	不时发生