frequency lock锁频frequencyn.频繁；频率frequency synthesizer with high stability高稳定性频率源frequency conversion and speed regulating调频变速Frequency selectivity of resonant circuit共振电路的频率选择性Frequency Conversion Transforming Oil Rig石油钻机的变频改造frequency-dependent negative resistance频率相关负电阻, 随频率而变的负电阻frequency-domain model reduction method频域模型降阶法frequency conversion and speed modulation变频调速frequency conversion and speed adjustment变频调速Frequency division geological calibration分频地质标定frequency-conversion speed-regulation变频调速

1. It was used as a frequency divider and no numbers are decoded from it.
   它被用作无解码输出的分频器。
2. This paper gives a new method of designing low frequency multiplier by expounding the principles and analyzing the characteristics.
   文章提出了一种全新的低频倍频器的设计方法，并对其原理及特性进行了阐述与分析。