地球上有许多地方,人活得挺艰难。玻利维亚和西藏的高山上、亚马逊河谷的丛林中都是艰难的定居之地。但是地球上杳无人烟的地方也极少,只有在覆盖着格陵兰和南极洲的大片冰原上和空气稀落得难以呼吸的最高山脉的顶部才无人居住。即使生活在沙漠地区,热带雨林之地以及北极附近的 There are many places on Earth where people live very hard. In the jungles of Bolivia and Tibet, in the Amazon valley, it is a difficult place to settle. But there are very few places on the planet where there is no place to live. It is uninhabited only on the large ice sheets covering Greenland and Antarctica, and on the top of the highest mountains where the air is hard to breathe. Even living in desert areas, near tropical rain forests and the Arctic