摘要
冰山是一块大若山川的冰,脱离了冰川或冰架,在海洋里漂流。而我们常用“冰山一角”来形容问题很严重,这是因为冰山约有90%的体积是在海面以下,而浮在海面上只有一小部分。漂浮在海洋中的一大块冰被称为冰山。许多冰山如房屋或大型建筑物一样大。冰山来自冰川,是冰川断裂后落入大海的碎片,这些碎片可以漂流数千英里。当到达足够温暖的水域时,它们就会融化。每年在北极和南极,都会形成数以千计的冰山。
A huge part of ice 1)floating in the ocean is called an iceberg.Many icebergs are the size of houses or large buildings.Icebergs come from 2)glaciers.Pieces of a glacier break off into the ocean.The pieces,can 3)drift for thousands of miles.When they reach waters that are warm enough,they melt away.Thousands of icebergs form each year in the Arctic and in Antarctica.
