Furthermore, the properties of polarons in polar crystals are investigated by taking account of the influence of pressure effect and the electrons emitting or absorbing many virtual phonons.

考虑电子发射和吸收多个虚声子的影响，讨论了压力作用下极性晶体中极化子基态的性质。

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The upshot is that pairs of virtual phonons are appearing and disappearing all the time, and if one gets trapped inside a supersonic boundary, the other should be released into the wider world to make a noise.

ECONOMIST: Black holes on a desktop: Dumb insolence | The