肉眼观察 ròuyǎnguānchá observation with the naked eye Origin Definitions Defs Strokes Stroke Words Sentences Sents 肉眼 ròuyǎn noun naked eye The human eye used alone without the help of a telescope, microscope, or other instruments观察 觀察 guānchá verb to observe to observe; to watch; to survey; to inspect something closely