occurrence rhythm的用法和樣例：
例句
- 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。 - 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.
根據稻飛虱的生活習性和發生規律，在做預報時，對下列幾個問題應進行具體分析。
