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| 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; Взаимодействующая система биологических сообществ и их неживой окружающей среды, расположенная в регионах, где средняя температура воздуха в течение года не превышает 10 градусов С, обычно около Южного и Северного полюсов) | |||
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