单词	使更壞
释义	同TO DETERIORATE
随便看	optical reading direct input system--ordis optical reading direct input system，ordis optical reading equipment optical reading theodolite 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