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| English | Chinese |
| 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 | 极地生态系统 (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。) |
| polar region Area relating to the earth's poles or the area inside the Arctic or Antarctic Circles | 极地 (该区域的地球磁极分别为北极和南极。) |