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
What kinds of articles have you written?
你写过一些什么样的文章？
May I come in?
我能进来吗？
One packing case was crushed.
有一个箱子全压坏了。