Rdf
无线电测向器, 无线电定向仪, 无线电探问, 无线电测向
🗣️ 情景例句
A red sky at night indicates fine weather the following day.
晚上天边红预示着明早天气好。
You have to change at chicago station.
你必须要在芝加哥站转车。
I can believe that.
我相信。