ice vein

例句：

1. 1. The ice vein in the lake is visible from the shore.
   湖中的冰纹从岸边就能看到。
2. 2. The ice vein runs through the entire length of the glacier.
   冰纹贯穿整个冰川的长度。
3. 3.The ice vein is a fascinating feature of the landscape.
   冰纹是这个景观的一个令人着迷的特征。