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三用之不竭的地下热库我们人类居住的这个星球,很像一个大热水瓶,外凉内热,而且是越往里温度越高。人们把来自地球内部的热能,叫做“地热能”。地球通过火山爆发和温泉等途径,将其内部蕴藏的热能源源不断地输送到地面上来。人们司空见惯的温泉,就是人类的祖先在很早以前就开始利用的一种地热能。可
The Unexpected Underground Heat Library The planet we humans live in is like a big thermos, with a cool, hot inner part and a higher temperature. People call the heat energy from inside the earth, called “geothermal energy.” Through volcanic eruptions and hot springs, the earth continuously conveys the heat energy it has accumulated to the ground. Hot springs that people are accustomed to are the kind of geothermal energy that human ancestors started to use long ago. can