occurrence rhythm

• 发生规律

occurrence rhythm的用法和样例：

例句

1. The occurrence rules of rice planthopper in rice field with cultural crab was ascertained through systemic investigation and field census.
   通过系统调查和大田普查相结合的方法，研究明确了养蟹稻田稻飞虱的发生规律。
2. Based on the habit and the occurrence fluctuations of rice planthopper, some aspects should be analyzed in rice planthopper forecast.The first is the induction of light trapping.
   根据稻飞虱的生活习性和发生规律，在做预报时，对下列几个问题应进行具体分析。