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极地生态系统
ecol. polar ecosystems
environ. polar ecosystem The interacting systems of the biological communities and their nonliving environmental surroundings located in the regions where the air temperature is perennially below 10° Celsius, usually at and near the North and South Poles (生物群落和生物环境的交互位于气温是摄氏Code:10度以下的地区,通常位于北极和南极附近。)
tech. Arctic ecosystem; polar ecosystem