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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 shift transmission
frequency shift type telemeter
frequency-shift type telemeter
frequency, side
frequency signal
frequency signal output terminal
frequency signal starting apparatus
frequency slicing
frequency sounding
frequency space
frequency-space domain
frequency-space domain (f-x domain)
frequency span
frequency spectrograph
frequency spectrum
[frequency] spectrum
frequency spectrum amplitude
frequency spectrum analyzer
frequency spectrum image capturing
frequency spectrum peak value
frequency [speed] control
frequency splitting
frequency spread
frequency spread of reverberation
frequency spread phase lock
frequency stability
Frequency stability
Frequency Stability Control
frequency stability control
frequency stability [of a dielectric heating generator]
Frequency stability of capacitors
frequency stabilization
Frequency stabilization
frequency stabilization circuits
frequency stabilized laser
frequency stabilizer
frequency stacking
frequency staggering
Frequency Standard
frequency standard
frequency standard comparator
frequency standard{=FS}
Frequency standards
frequency step
frequency-stepped waveform
frequency stepping
Frequency, storm
frequency subband
frequency subbands
frequency, subcarrier
frequency substitution estimate
frequency surface
frequency sweep
frequency-sweep generator
frequency sweeping
frequency swept
frequency swing
frequency switching
frequency synchronism
frequency synchronization
Frequency synthesis
frequency synthesis
frequency synthesizer
frequency synthesizer control function
frequency synthesizer lock
frequency synthesizer phase lock
frequency synthesizer phase locked
frequency synthesizer phase locked loop
frequency synthesizer phase lock loop
Frequency synthesizers and dividers
frequency synthetic
frequency system
frequency system clock
Frequency systhesizers
frequency table
Frequency table
frequency tabulation
frequency tachometer
frequency tally
frequency tape
frequency telemetering
frequency terminal
frequency test
frequency theory
frequency theory of probability
frequency thermometer
frequency threshold
frequency-time analysis
frequency-time analysis method (FTAN method)
frequency time clock
frequency time coding of pulse
frequency time control{=FTC}
frequency time curve {=FTC}
frequency-time dodging
frequency time intensity
frequency time modulation{=FTM}
frequency-time response
frequency-time spectral density function
Frequency Time Standard{=FTS}
frequency time standard{=FTS}
frequency tolerance
frequency-to-number converter
Frequency, total
frequency tracer
Frequency tracking
frequency tracking
frequency tracking filter
frequency tracking stability
frequency transducer
Frequency transducers
frequency transfer
frequency transfer confusion
Frequency transfer function
frequency transfer function
Frequency Transformation
frequency transformation
frequency transformer
frequency transient response
frequency-translated holography
frequency translation
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