underwater ice

例句：

1. 1. The ship sank into the depths of the ocean, leaving only a few pieces of underwater ice to be seen.
   这艘船沉入海底，只留下几块水下冰块。
2. 2. The explorers found themselves in a frozen wasteland, with only underwater ice to sustain them.
   探险者们发现自己置身于一片冰冻的荒原，只有水下冰来维持他们的生命。
3. 3. The polar bears hunted for food on the icy surface of the Arctic Ocean, where they could find only underwater ice.
   北极熊在北极洋冰冷的表面寻找食物，那里只有水下冰可供它们捕食。