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工作学习
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科技杂谈
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ZT 说“永动机”不可能的人的一条理由就是这违背了能量守恒定律,但能量守恒定律的前提条件是封闭系统,而封闭系统实际上又不存在。哈哈.
-
nazacalines
(游戏);
2019-6-12
{2598}
(#12142925@0)
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