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地理开学开学第一课Talking about geography with students2020/8/16在夜晚抬起头，在头顶的一片漆黑中，有至少1250亿个星系Looking up at night, there are at least 125 billion galaxies in the dark overhead这是银河，1250亿个星系的其中一个，在这个星系中，有约400亿颗星球This is the Milky way, one of the 125 billion galaxies in which there are about 40 billion planets地球，只是银河系中很不起眼的一颗行星，但是却孕育出了生命The earth is just a humble planet in the Milky way, but it gives birth to life这是月球，地球的唯一卫星This is the moon, the only satellite of the earth. It looks very far away, but it is a necessary condition for the existence of waves on the earth地球上71%的面积都是海洋，仅仅是太平洋的面积，就可以装的下所有陆地71% of the earth's surface is ocean, and the Pacific Ocean alone can hold all the land这是冰岛海边的景观，它的名字玄武岩，你知道它为什么是现在这个样子吗？This is basalt on the coast of Iceland. Its name is HVítserkur. Do you know why