环境温度的上升正在逐步融化冰川和两极的冰架，同时它又直接地加热了海洋，使海洋膨胀，海平面升高。
Rising temperatures are melting glaciers and ice sheets, as well as warming the oceans directly, which causes them to expand.
这艘NASA无人驾驶飞船于1998年1月7日发射，使命是围绕月球飞行并在月球两极永远在阴影中的火山口里寻找水冰以及其它物质存在的迹象。
This NASA unmanned spacecraft launched Jan. 7, 1998 on a mission to orbit the moon in search of signs of water ice and other minerals in permanently shaded craters at the lunar poles.
如果这种变暖发生，两极的冰帽将开始融化，从而使海平面上升数米，并严重淹没沿海城市。
If this warming up took place, the ice caps in the poles would begin to melt, thus raising sea level several metres and severely flooding coastal cities.
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