最冷的海洋在南、北极附近,叫做极地海。它们在秋季结冰,春季融化。即便如此,许多动物还是生活在那里。被称做冰山的厚冰块漂浮在极地的海水中,有些来自陆地上倾泄(xiè)而下的冰河,有些是从陆地上高耸的冰架上断裂下来的。融化时,冰山破碎成较小的冰块,叫冰山碎片。冰山慢慢漂 The coldest ocean in the South, near the North Pole, called the polar sea. They freeze in autumn and melt in spring. Even so, many animals still live there. Thick ice, called icebergs, floated in the polar waters, some from the glacial ice that fell from the land, some from the towering ice shelf on land. Melting, iceberg broken into smaller pieces of ice, called iceberg fragments. Ice slowly drifting