FBrE/ef/NAmE/ef/noun (also f) [C, U] (Fs, F's, f'sBrE/efs/NAmE/efs/) the6thletteroftheEnglishalphabet英语字母表的第 6 个字母◆'Fox'beginswith (an) F/'F'.fox 一词以字母 f 开头。F(music音乐) thefourthnoteinthescale of C major * F 音(C 大调的第 4 音或音符)the6thhighestmark/gradethatastudentcangetforapieceofwork, showingthatitisverybadandthestudenthasfailed(学业成绩)第六等,不及格◆Hegot(an) F/'F'in/forChemistry.他的化学成绩不及格。➡ see alsoF-word