Rf
射频, 测距计, 测远仪\\n[计] 射频
🗣️ 情景例句
Please, after you.
你先请。
All work and no play makes Jack a dull boy.
只工作，不玩耍，聪明小孩也变傻。
You've done very well. It's a pity you missed the sports meeting last week.
你学得不错嘛。很可惜，你错过了上周的运动会。