R-f preselectors
[电] 射频预选器
🗣️ 情景例句
She complained, with reason, that she had been underpaid.
她抱怨她的工资一直很低，这也不无道理。
If you have no hand, you cannot make a fist.
巧妇难为无米之炊。
No matter how much we like honey, or how much we have read about the uncanny sense of direction which bees possess, we have a horror of being stung.
不管我们多么爱吃蜂蜜，或读过多少关于蜜蜂具有神秘的识别方向的灵感的书，我们仍然十分害怕被蜂蜇。