来自《耶鲁大学开放课程：新生有机化学 第7集 第7集》

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  How many numbers do you need?
  需要多少信息呢
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  You need x, y, z for every particle.
  你需要x y z这3个坐标来定位
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  Right? So you need 3N arguments for Ψ.
  也就是说需要3N个自变量
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  So Ψ is a function that
  所以波函数就是
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  when you tell it where all these positions are,
  当你输入粒子位置信息时
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  it gives you a number. Now curiously enough,
  它能给你一个输出结果 奇怪的是
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  the number can be positive, it can be zero, it can be negative,
  这个结果可正可负可为零
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  it can even be complex, right,
  它也可以很复杂
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  although we won't talk about cases where it's complex.
  当然复杂的情况暂且不讨论
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  The physicists will tell you about those,
  物理学家会告诉你们复杂的情况
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  or physical chemists. Okay?
  或物理化学家们
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  And sometimes it can be as many as 4N+1 arguments.
  有时自变量可多达4N+1个