Fof
abbr. free on field (airmail) 野外免费
🗣️ 情景例句
Mr. Stewart, I just spoke to Mr. Carlson. Stewart
先生， 我刚刚与Carlson先生通了话。
There are four quarters in every dollar.
每美元有四个二角五分。
Police are wary of itinerants who cannot be traced to a recognized camp boundary or to four walls.
警察则对那些查不出有固定营地或住处的游荡者保持警惕。