一张以前所未有的精度绘制出的新地图呈现了南极洲冰层下地貌前所未见的细节。科学家认为这张地图能极大地增进我们对这片白色冰封大陆的认识。 Thanks to data collected by satellites, scientists have a good understanding of Antarctica's icy surface, but what lies beneath has ...