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	bacon beetle Bacon biliteral cipher bacon hog bacon pig bacon square bacon type baconer baconers Baconian Baconian induction Baconianism baconians Baconism bacons baconweed Bacoor Bacopa Bacsonian bact bacteraemia bacteraemias bacteremia bacteremias bacteremic bacteri-

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。