intermediate frequency (i-f)

• 中频

intermediate frequency (i-f)的用法和样例：

例句

1. Intermediate frequency instability has had the most uneven history.
   中频不稳定性的研究经历了极为曲折的道路。
2. Low and intermediate frequency instability models are taken up first.
   首先处理低频和中频不稳定性的模型。