abbr.当且仅当(=if and only if)
IFF.
abbr.敌我识别器(=Identification;Friend or Foe)
Solution: IFF inoperative in OFF mode. 解决:IFF无法操作已关掉。
ETrue iff the editable state can be left. 如果可编辑的状态可以离开返回。
IFF always inoperative in OFF mode. 甚高频在关闭模式下当然不能用。
Iff you look back, your journey is ended. 如果你向后看,你的旅程已经终结。
It also has 4 IFF antenna dipoles across the top of the bedspring. 在天线顶端还有4组IFF偶极天线。