Usually when we think of icebergs, we don't imagine perfect geometric shapes. 想到冰山时，我们通常不会将其与完美的几何形状联系起来。 But that's exactly what NASA captured in an image posted on Twitter of an iceberg in what appears to be the shape of a perfect rectangle. 但美国宇航局近日在推特发布的一张图片上的冰山却呈现出完美的矩形。 The image was captured during a flight for Operation IceBridge, the largest airborne survey of Earth's polar ice. 这张图片是美国宇航局在执行“冰桥行动”时在飞行途中拍到的，“冰桥行动”是针对地球极地冰展开的最大规模的航空测量。
It even has a name: A tabular iceberg, a type of iceberg both broad and flat. 这种冰山甚至还有名字：平顶冰山，即又宽又平的冰山。 "The iceberg's sharp angles and flat surface indicate that it probably recently calved from the ice shelf," according to a statement from NASA. 美国宇航局在一份声明中称：“这个冰山的直角和平坦表面显示，它可能是最近才从冰架上崩解下来的。” The iceberg is believed to have broken off from the Larsen C ice shelf. 据说，这座冰山是从拉森C冰架上掉下来的。
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