F, f

n (pl F's, f's / efs; Zfs/) 1 the sixth letter of the English alphabet 英语字母表的第六个字母: `Fabric' starts with an `F'/F. fabric一字以f字母开始. 2 F (music 音) the fourth note in the scale of C major C大调音阶中的第四音或音符.


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