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来源:雅诚德英语网
Our great-grandfathers must have been puzzled about where the solar energy came from the heat and the light, where it came from.
我们的先辈一定,很惊讶于,太阳能是哪里来的,光和热是来自哪里。
Our great-grandfathers must have been puzzled about where the solar energy came from the heat and the light, where it came from.
我们的先辈一定,很惊讶于,太阳能是哪里来的,光和热是来自哪里。