单词	lead–in
释义	同lead-in
随便看	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 optical relay optical relays optical relief model optical remote sensing optical remote sensor optical repeater optical repeater power optical resin optical resolution optical resolving power