为什么自然中很多都是对称的，而时间不是对称的，和熵增有什么关系？

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问题：为什么自然中很多都是对称的，而时间不是对称的，和熵增有什么关系？

思考：

  1. 时间的单向流动造成了周围的对称性。比如电子流动造成了对称的磁场，鱼要往前游，所以需要对称的身体。
  2. 时间的流动更多的是一种主观感受，因为有前一秒的记忆才会感到时间往前流。也就是因为有积分效应，才会感到时间在流动。而积分是有对称性的
  3. 对称的时间无法产生纷繁复杂的世界。因为有熵增的存在，导致积分效应明显，所以才能慢慢演化出各种不同的事物，自然，生物。如果时间的流动是对称的，且往前和往后的概率相同，那么就会导致时间一会往前，一会往后，世界始终处于一潭死水，无法演化成复杂多样的物质。
  4. 因为物质是连续性的，即使时间往前往后符合均匀分布，但往前的过程和往后的过程都可以切分成无数个无穷小，这些同一时间方向上的无穷小组合起来，就能形成复杂的世界。所以也许我们只是处于动态对称过程中的一瞬
  5. 人身处时间的流动中，自然无法觉察时间的对称性。但如果跳出时间的流动，从更高维度俯视，也许时间只是一个静态对称的维度，只是人的灵魂在其中流动罢了。

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