南极

例句：

1. 1. The Arctic is home to many unique species of animals and plants.
   北极是许多独特物种的家园。
2. 2.The Arctic Circle marks the boundary between the Arctic and the Northern Hemisphere.
   北极圈标志着北极和北半球的分界线。
3. 3. The Arctic ice cap is a vital part of the global climate system.
   北极冰盖是全球气候系统的重要组成部分。