脆弱生态系统有三种理解：其一是指生态系统的正常功能被打乱，系统发生了不可逆变化，从而失去恢复能力的生态系统；其二是指当生态系统发生了变化，以至于影响人类的生存和自然资源利用的生态系统；其三是指生态系统退化超过了在现有社会经济和技术水平下能长期维持人类利用和发展水平的状况。
今天的报告是迄今为止对气候变化和人类开发对南极脆弱生态系统的潜在破坏性影响发出的最严厉警告。
Today's report is the starkest warning yet of the potentially devastating impact of climate change and human exploitation on the Antarctic's delicate ecosystems.
迪乌夫博士建议向生活在脆弱生态系统中的农民支付环境服务和碳保存及碳吸存费用。
Payments for environmental services and for carbon conservation and sequestration could be made to farmers living in fragile ecosystems, Dr Diouf suggested.
高级定制，还健在的，有点像被现代审美品位和在历史中不能自拔的国家所包围的脆弱生态系统。
Haute couture, what remains of it, is a little like a fragile ecosystem under siege by modern tastes and habits, and by couturiers who are stuck in the past.
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