frequencyn.频繁;频率
frequency of disease development发病频率
frequency-deviation estimation频偏估计
frequency division demultiplexer频分多路分用器
frequency of physical activities体育活动频度
frequency modulation demodulator频率调制解调器
frequency-doubled ND YAG laser倍频掺钕钇铝石榴石激光器
frequency regulating transformer调频变压器
frequency-difference principle频差法