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- intermediate frequency amplification 中频放大
- ultrasonic frequency amplification 超声频放大
- high frequency amplification receiver 高放式接收机
- ultra-high frequency amplification 超高频放大
- ultramplification high frequency amplification 超高频放大
- He varied the transmission frequency. 他变换了无线电传送的频率。
- A unit of frequency equal to one cycle per second. 赫兹频率的单位，等于每秒一周
- Fatal accidents have decreased in frequency over recent years. 近年来死亡事故发生的频率已经下降。
- We can often correlate age with frequency of illness. 年龄的大小往往与发病率有关。
- low frequency amplification 频大
- Accidents on that highway are happening with increasing frequency. 那条高速公路上车祸发生得越来越频繁。
- audio frequency amplification 声频放大
- video frequency amplification 视频放大
- frequency amplification 扩频
- He tuned his radio to the police frequency. 他把无线电调到警方的频率。
- radio frequency amplification 射频放大
- high frequency amplification 高频放大
- carrier frequency amplification 载频放大
- He manipulated the frequency dial of the radio. 他开始调拨频率键盘。
- The pitch depends on the frequency. 音调的高低是由频率决定的。
