单词	dioptrics
释义	di·op·trics (dī-ŏptrĭks) n. (used with a sing. verb) The study of the refraction of light.
随便看	royalmast royal mast royal palm royal poinciana royal purple royal-purple royalty royal we Roy David Roy Ellsworth Roy Marcus RP RPG R plasmid rpm rps RQ R & R RR RRB -rrhagia -rrhea -rrhoea rRNA RS

英语词典包含135693条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。