富营养化是导致湖泊生态系统退化的主要因素。
Eutrophication is the main factor for the degradation of lake ecosystem.
但由于人为因素的影响和破坏，草地生态环境发生严重退化。
Eco - environment of grassland degraded seriously because of human influence and destruction.
但由于人为因素的影响和破坏，草地生态环境发生严重退化。
Eco - environment of grassland degraded seriously because of human influence and destruction.
应用推荐