VFR
美英
        - abbr.(=visual flight rules)【航】目视飞航规则
- 网络目视飞行规则(Visual Flight Rules);变量的帧速率(Variable Frame Rate)
 VFR
VFRVFR
目视飞行规则(Visual Flight Rules)
飞机可以在目视飞行规则(VFR)和仪表飞行规则(IFR)下,在非结冰条件下飞行。如果选装尾翼除冰装置,可以在结冰条件下飞行。
                变量的帧速率(Variable Frame Rate)
 Variable frame rate (VFR) analysis is a technique used in speech recognition for discarding frames which are very much alike.
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