ice layer

例句：

1. 1. The glacier has been advancing slowly towards the sea.
   冰川正缓慢地向海移动。
2. 2.The glacier is a fascinating natural wonder that scientists study to understand climate change.
   冰川是科学家们研究以了解气候变化的一个迷人的自然奇观。
3. 3. The ice layer on top of the glacier acts as a protective barrier against the wind and waves.
   冰川顶部的冰层作为防风和波浪的保护屏障。