频: Ⅰ形容词(次数多) frequent 短语和例子这儿春季雨很频。 rains are frequent here in spring.Ⅱ副词(屡次) frequently; repeatedly 短语和例子捷报频传。 reports of new victories keep pouring in.Ⅲ名词1.[物理学] (物体每秒钟振动的次数) frequency 短语和例
光频放大器: optical frequency amplifieroptical frequnency amplifier
Method for measuring audio amplifier single - frequency output for institutional audio - visual equipment used primarily for speech 用于演讲的教学视听设备中音频放大器的单频输出测量方法