F字开头的单词或词组
fastenfrom time to timefopfallenfull-fledgedFaustFeb.feastfruitsfacial expressionfor the momentfragrancefamily treefall short offugfundedfill upfallingfeederflirt withfreeingfloatingfinishingfall back onfumbleflopfungifranklyfolklorefoulframeworkfoyerflamingofreelyfeyflickerfixingfirm offerfall offfaultyfor that matterfeudalism