释义
n. 生态系统
例句
1. An organism, often a bacterium or fungus, that feeds on and breaks down dead plant or animal matter, thus making organic nutrients available to the ecosystem. 腐生菌；腐生物一种有机物，通常是细菌以死的动植物为食并把它们分解，藉此为生态系统提供有机养分