Afn
abbr. 平均故障數（average failure number）
??? 情景例句
Yes, I remember. You were a great help.
是的， 我記得。你幫了個大忙。
Oh,I just remembered something!I have to apply for a passport.
哦,我就記得了一些東西!我要申請一本護照。
How about a drink tonight?
今晚喝一杯怎樣？