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F 开头的英语单词（共 143,619 个）
frequency primary standard
频率原级标准
frequency probability
[统计] 频数概率
frequency programming
频率程序设计
frequency protection
频率保护装置
frequency pulling
[电] 频率曳移
frequency pulling effect
频率牵引效应
frequency pulse
频率脉冲
frequency pushing
[电] 频率推进
frequency pushing factor
频率推移系数
frequency quotient
[统计] 频数商
frequency raiser
[电] 增频器
frequency range
[计] 频率范围
frequency range expanding method
[电子] 测频扩展法
frequency rate
频率变率
frequency rating
定频率
frequency ratio
[计] 频率比\n[化] 频比(通常指强制频率与自然频率的比)
frequency reconnaissance
[电子] 频率侦察
frequency record
[电] 频率记录
frequency recorder
[电] 频率记录器
frequency recovery
率复原，频率回升
frequency reference
基准频率;参考频率
frequency region
[网络] 频域分形维数的估计方法；频道
frequency regulation
[电] 频率调整
frequency regulator
[电] 频率调整器
frequency relation
频率关系
frequency relation limit
频率关系限制