单词	f-system
释义	f-system noun : a system of camera lens aperture markings that uses f-numbers Word History Etymology f (symbol for focal length)
随便看	retieing reties retiform retighten retightened retightening retightens retile retiled retiles retiling retimber retime retimed retimes retiming retin- retina retinacula retinaculate retinaculum retinae retinal retinal detachment retinal purple

英语词典包含469781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。