dirty ice

例句：

1. 1. The kids were playing in the dirty ice on the lake.
   孩子们在湖上的脏冰上玩耍。
2. 2.The dirty ice cracked under their feet.
   脏冰在他们脚下裂开了。
3. 3. The children were afraid of the dirty ice and kept a safe distance from it.
   孩子们害怕脏冰，保持了安全距离。