ground ice mound

例句：

1. 1. The ground ice mound isa natural formation that has been there forthousands of years.
   地面冰丘是一个自然形成的结构，已经存在了数千年。
2. 2. Thescientists were studying the ground ice moundwhen they discovered a new species of plant.
   科学家们正在研究地面冰丘时，发现了一种新的植物物种。
3. 3. The ground ice moundwas formed by the accumulation of snow andice over time.
   地面冰丘是由雪和冰的积累形成的。