英语翻译
QCLsbasedonpolarsemiconductorssuchasGaAs/AlGaAsandAlInAs/GaInAsarenotcapableofemittingintheenergyrangearoundthelongitudinaloptical(LO)phononenergies(ELO=36meVinGaAsandELO=34meVinInGaAs),leavingagapinthespectralrangebetween30and40.怎么翻译啊?
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