来自《耶鲁大学开放课程：基础物理 第17集 第17集》

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  That's why A and B were related, by complex conjugation.
  这就是 A 和 B 之间的联系 互为复共轭
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  Here, if I take the complex conjugate of x,
  这里 如果我取 x 的复共轭
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  e^(α+·t), if it's real,
  e^(α+·t) 如果它是实数
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  it remains itself.
  它还会保持不变
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  So, A just goes into A*, B goes into B*,
  A 就变成了A* 而 B 变成了 B*
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  and you want the answer to be unchanged.
  并且你想要答案不变
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  That requires A equal to A* and B equal to B*.
  那需要 A 等于 A* 且 B 等于 B*
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  Thanks for pointing out that here.
  谢谢在此指出这一点
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  We do want A equal to A*
  我们确实要 A 等于 A*
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  and B equal to B*.
  且 B 等于 B*
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  So, what I'm telling you is go take the solution,
  我要告诉你们的是 对这个解
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  conjugate it and equate it to itself,
  取其复共轭 令其等于本身