subnival belt

例句：

1. 1. The subnival region is home to many unique wildlife species.
   副极地地区是许多独特野生动物物种的家园。
2. 2.The subnival belt is characterized by its cold and snowy conditions.
   副极地带以其寒冷和雪地条件而著称。
3. 3.The subnival belt plays a crucial role in the global climate system.
   副极地带在全球气候系统中起着至关重要的作用。