Phycomycetes

例句：

1. 1. The phycomycetes are a group of microscopic organisms that can cause diseases in humans and animals.
   霉菌是一种微生物，可以引起人类和动物的疾病。
2. 2. Phycomycetes play an important role in the soil ecosystem by decomposing organic matter and releasing nutrients.
   霉菌在土壤生态系统中起着重要作用，通过分解有机物质并释放养分。
3. 3. In agriculture, phycomycetes are used to control pests and diseases in crops.
   在农业中，霉菌被用来控制作物中的害虫和疾病。