Microwave frequencies
[电] 微波频率
🧩 词语组成解析
n. 频率（frequency的复数形式）；频数分析；次数分配表
🗣️ 情景例句
to plan the refurnishing of the old library
计划重新整修老图书馆
Where am I supposed to pay the excess train fare?
我应该在哪里补票？
I've worked here since 1989.
我自1989年以来便在这家工厂工作了。