Radioecho
无线电回波, 无线电反射信号
🗣️ 情景例句
The radio has lost most of its audience, thanks to TV.
由于电视的存在，收音机失去了大量听众。
Every advantage has its disadvantage.
有利必有弊。
Can you ring up the bus company?
你能给汽车公司打个电话吗？