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早在周代,中国劳动人民已懂得使用“阳燧”(即凹面镜)聚焦阳光取火,这是人类最早利用太阳能的一种方法。春秋战国时期,中国劳动人民对
As early as the Zhou dynasty, the working people in China already knew how to use “Yang Sui” (ie, a concave mirror) to focus sunlight and take fire, which is one of the earliest ways of using solar energy for mankind. Spring and Autumn Period, China’s working people right