Rfa
abbr. request for applications 应用要求; radio frequency authorization 无线电频率授权; radio frequency attenuator 无线电频率衰减器; request further airways 要求更远的航线
🗣️ 情景例句
Aren't you a little scared?
难道你不会感到有点紧张吗？
I can't promise anything,but I'll do my best.
不敢保证，不过我尽力而为。
He does exercises every day in the morning.
他每天早上锻练身体。