iceberg furrow mark

例句：

1. 1. The icebergwas so large that it could be seenfrom space.
   这个冰山太大了，可以从太空看到。
2. 2. Icebergs are a commonsight in the Arctic.
   在北极，冰山很常见。
3. 3. The iceberg is slowly melting due to global warming.
   由于全球变暖，冰山正在缓慢融化。