Fof
abbr. free on field (airmail) 野外免费
🗣️ 情景例句
ready for the graduation ceremony,
为毕业典礼做准备，
The shoes are worn-out.
这鞋已经不能穿了。
He goes home early everyday for fear that his wife would be angry.
他每天很早就回家，免得老婆生气。