microwave frequencies短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 电微波频率 A simple method for nondestructive measurement of the complex permittivity of substrates at microwave frequencies is presented. 提出了一种无损测量微波电路基片复介电常数的简单方法。 cnki In addition, much more information can be carried at optical frequencies than at the lower microwave frequencies. 此外，用光频率传输的信号量要比用较低的微渡频率传输大得多。 aikj