F-f cavity preselector
[电] 射频空腔预选器
🧩 词语组成解析
[计] 预选器, 预选程序
🗣️ 情景例句
The wristband. Something old?
腕带。旧的东西，
In the United States ,there are many factories for making cloth.
在美国，有许多造布的工厂 。
He seems a little nervous.
他显得有点紧张。