radio jet射电喷流radion.收音机；无线电v.用无线电通讯radiotelephony network无线电话网Radiometric Geophysics放射性物探radio-frequency unit射频部件radioelectrocardiogram放射心电图radiochemoluminescence辐射化学发光radio refractive index无线电波折射率radio wave attenuation电波衰减radio-radar absorber无线电雷达电磁波吸收剂radiocarbon chronology放射性碳测定年代法,放射性碳纪年法radiometer sensitivity辐射计灵敏度