In a lossless unit, any change from a polarization state to another polarization state is pointed out to be corresponded to a rotation of Poincare sphere relative to the diameter.

指出在一个无损耗单元内，从一个偏振态到另一个偏振态的任何变化，都对应着庞加莱球相对于直径的一个旋转。

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Although the board hasn't indicated its thinking, students at Penn State now offer mixed impressions about the prospect of yet another trace of their former coach wiped from the public sphere.

CNN: July 28, 2012 -- Updated 1425 GMT (2225 HKT)

So it might be expected that lawyers could slide easily from one English-speaking or Commonwealth country to another, while finding it harder to leave the Anglo-sphere.

ECONOMIST: Law and globalisation