贫民窟中的黑科技,单靠重力工作的电灯

上帝说,要有光,世界便有了光。 当我们在享受电灯带来的各种便利时,身处在发展中国家贫困地区的人们却在依靠极度危险的煤油灯进行照明。非营利组织 GravityLight 针对发展中国家普遍用不上电的情况,推出一款依靠一

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