定向偶极区

1. 极带：polar year 极年 | polar zone 极带 | polarimeter 偏振计

2. 寒带：polar region 极地 | polar zone 寒带 | polarimeter 偏振计

3. 極區：polar year 極年 | polar zone 極區 | polar-cap absorption 極冠吸收

noun

1. the part of the Earth's surface forming a cap over a pole
characterized by frigid climate

Synonym: Frigid Zonepolar region