occurrence regularity的用法和樣例：
例句
- Study on the pathogenisis regularity of root rot on Atractylodes macrocephala Koidz.
白朮根腐病發生規律研究。 - The occurrence rules of rice planthopper in rice field with cultural crab was ascertained through systemic investigation and field census.
通過系統調查和大田普查相結合的方法，研究明確了養蟹稻田稻飛虱的發生規律。
