南极，为什么是地球最冷的地方？

Antarctica is the coldest place on Earth. 南极是地球上最冷的地方。 It is covered by a thick, high ice sheet. 它盖着又高又厚的冰盖。 The bright white ice reflects sunlight away. 白白的冰把阳光都反射走。 Little heat comes back to warm the land. 几乎没有热量留下来变暖。 Temperatures can drop to minus eighty. 气温能降到零下八九十度。 Penguins are the tough locals there. 企鹅是那里最扛冻的居民。