说起冰川,我们会想起寒冷的极地、美丽的极光和可爱的企鹅。而我们所不了解的是,这一神秘而又令人敬畏的自然存在也在改造着地球表面。来听一听美国老师是怎么讲解的吧。Did you know that almost 10%of Earth’s surfaceis covered with ice?Most of the ice is in glaciers,largemasses of moving ice that form over hundreds or thou- Speaking of glaciers, we will think of the cold polar, beautiful aurora and cute penguin. What we do not understand is that this mysterious and awesome natural existence is also transforming the surface of the earth. Come and listen to how American teachers explain it. Did you know that almost 10% of Earth’s surfaceis covered with ice? Most of the ice is in glaciers, largemasses of moving ice that form over hundreds or thou-