单词	分子云
释义	分子云molecular cloud
随便看	optical read-only memory optical readout unit optical read/write head optical receiver optical recognition optical recognition device optical recombiner optical recorder optical recording optical recording media optical recording/reading heads optical rectification optical refinement optical reflection optical reflectometer optical reflectometry optical reflector optical refraction optical refractive index optical refractive index sensor optical refractometry and reflectometry optical refrigeration optical regeneration optical region optical registration