health state of ecological system 基本例句 生态系统健康 Research Review on Wetland Ecosystem Health.湿地生态系统健康研究进展。 Biju said that frogs in India, like frogs in South America, are considered an important indicator species for the health of an ecosystem.比优称印度的青蛙和南美的青蛙一样，被认为是生态系统健康的一个重要指示物种。