PMD问题的最大困难在于差分群延迟(DGD)和偏振主态(PSP)变化的随机性。

The difficulty of solving PMD lies in its randomness of differential group delay (DGD) between the principal states of polarization (PSP) and the change.

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如果我们说的是，第四激发态，我们用，主量子数来描述，哪个主量子数对应了，氢原子的第四激发态？

So if we're talking about the fourth excited state, and we talk instead about principle quantum numbers, what principle quantum number corresponds to the fourth excited state of a hydrogen atom.

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对于一个用于产生压缩态的典型的耗散系统，我们利用非主方程方法，得到其严格的解析解。

An exact analytical solution was obtained in a typical dissipation system which can be used to generate squeezed state of light.

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