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科学时代收录了3405121条科普词条，基本涵盖了常见科普常识及英语词汇的翻译，是科学学习和研究的有利工具。
frequency domain excision
frequency domain experiment design
frequency-domain filtering
frequency domain interface suppression
frequency-domain IP method
frequency domain joint detection
frequency-domain mask
frequency domain measurement
frequency-domain method
frequency domain method
frequency-domain migration
frequency domain multiplexing
frequency domain null
frequency domain parallelism
Frequency domain photon migration
frequency domain pitch
frequency-domain reflectometer
frequency domain signal generating
frequency-domain sounding
frequency domain synthesis
frequency, Doppler
frequency doubler
frequency doubler{=FD}
frequency doubler; multiplier
Frequency doublers
Frequency doubling
frequency doubling
frequency doubling amplifier
frequency doubling efficiency
frequency doubling laser
frequency doubling laser device
Frequency doubling test mode
frequency downconversion
frequency drift
frequency drift vs. power supply voltage
frequency drift vs. signal input level
frequency drift VS. time from turn on
frequency driven design
frequency drop
frequency effect
frequency eligibility rate
frequency eliminator
Frequency encoded CDMA
frequency energy
frequency equation
frequency error
frequency error estimate
frequency error estimator
frequency estimation
frequency exchanger
frequency exchange signaling
frequency exchange signalling
frequency {=f}
frequency factor
frequency fall
Frequency Festival
frequency filter
FREQUENCY FILTER
frequency filtering
frequency flat
frequency flat channel
Frequency, flood
frequency fluctuation
frequency, free-running
frequency (FREQ)
frequency{=FREQ}
frequency{frequence}
frequency frogging
frequency function
frequency, fundamental
frequency, fundamental natural
frequency-gain curve
frequency generator
frequency group
frequency-halving circuit
frequency hard handoff
frequency harmonics
frequency histogram
Frequency histogram
frequency hop communication
Frequency Hop{=FH}
frequency-hopped {=FH} spread spectrum
Frequency-Hopped (FH)spread spectrum signals
frequency-hopped spread spectrum
frequency-hopped spread spectrum {=FHSS}
frequency-hopped spread spectrum signal{=FH spread spectrum}
frequency-hopping
frequency hopping
Frequency hopping CDMA
Frequency hopping code
frequency-hopping code division multiple access{=FH-CDMA}
frequency hopping communication system
Frequency hopping{=FH}
frequency hopping filter
frequency hopping modulation
Frequency Hopping Multiple Access{=FHMA}
frequency hopping multiple access{=FHMA}
frequency hopping radio receiver
frequency hopping spread spectrum
frequency hopping spread spectrum{=FHSS}
frequency hopping spread spectrum modulation
frequency hopping spread spectrum system
frequency hopping system
frequency hopping time hopping{=FH/TH}
frequency hop rate
frequency hop sequence
frequency hysteresis
frequency idler
frequency impairment
frequency-independent antenna
frequency independent IQ imbalance
frequency index
frequency-indicating device
frequency indication
frequency indicator
frequency-induced fuze
frequency information
frequency, infrared
frequency instability
frequency, instantaneous
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