FSabbr.外事处(=Foreign Service)abbr.幻灯或电影的胶片(=filmstrip)abbr.飞秒(=femtosecond)FS keying circuit频移键控电路fs to am converter移频调幅变换器FSN Southwest?光电及光通讯产品FSO communications自由空间光通讯FSL-like language[计] 类似形式语义语言的语言fsar fiat secunndum依常规制作Fsex differentiation性[别]分化, 性分化FSR input correct.正确填写维修报告。fskite type structure钙钛矿(型)结构fstigue of a long journey长途旅行的疲劳