北冰洋

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 region is often referred to as the "Last Frontier."
   北极地区常被称为“最后边疆”。
3. 3. In the Arctic, the winters can be very harsh with temperatures dropping below -50°C.
   在北极，冬天非常严酷，温度会降到零下50摄氏度以下。