saprophytism

例句：

1. 1. The fungus is a natural parasite that feeds on dead plant material.
   这种真菌是一种自然寄生者，以死植物物质为食。
2. 2. Parasites can be harmful to the host organism, causing disease and death.
   寄生虫对宿主生物体有害，会导致疾病和死亡。
3. 3.In nature, saprobes are often found in areas with abundant organic matter, such as decaying leaves.
   在自然界中，腐食者通常发现在有机物质丰富的区域，如腐烂的叶子。