寒带

例句：

1. 1. The polar regions are home to many unique species of animals and plants.
   极地是许多独特物种的家园。
2. 2. The Arctic Circle marks the boundary between summer and winter in the Arctic region.
   北极圈标志着北极地区的夏季和冬季边界。
3. 3. The cold temperatures found in the polar regions have significant impacts on the ecosystems there.
   极地的低温对那里的生态系统产生了重大影响。