A1 [ C ] a piece of electronic equipment used for listening to radio broadcasts收音机
A1 [ S or U ] the programmes that you hear when you listen to the radio广播节目
B1 [ U ] the system or work of broadcasting sound programmes for the public to listen to(无线电)广播系统;广播工作
[ C or U ] a piece of electronic equipment that can send and receive spoken messages or signals, or the messages or signals that are sent or received无线电收发设备;无线电通讯
More examples
She set her clock by the time signal on the radio.
We've had complaints that you've been playing your radio too loud.
You turn this dial to find a different radio station.
I heard a really interesting programme on the radio this morning.
I rigged up a temporary radio aerial from a coat hanger.
to send a message to someone by radio用无线电发送(信息);向…发送无线电报;用无线电通讯
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