compound frequency distribution [统计] 复合频率分布
compound fundamental frequency 复合基频
frequency compound 频率合成
Frequency & Focus Compound 频率复合成像技术
multi-frequency compound signal 多频率合成信号
compound graph of frequency-response characteristics 频率特性复合图
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U.K.-based Compound Security Systems Ltd. sells a device to repel loitering teens with a frequency adults can't hear.
WSJ: A California City Is Into Tweeting��Chirping, Actually��in a Big Way
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