(pl. -os)［mass noun］
1- the transmission and reception of electromagnetic waves of radio frequency, especially those carrying sound messages无线电, 射电; 无线电传送与接收：
cellular phones are linked by radio rather than wires.
手机是无线而不是有线连接的。
1.1
- the activity or industry of broadcasting sound programmes to the public无线电广播; 无线电广播事业：
she has written much material for radio
她已为无线电广播创作了很多作品
as modifier a radio station无线电（广播）台。
1.2
- radio programmes无线电广播节目：
we used to listen to a lot of radio.
我们过去常听无线电广播。
1.3
- count noun an apparatus for receiving such programmes收音机; 无线电接收设备：
he switched the radio on.
他打开了收音机。
1.4
- count noun an apparatus capable of both receiving and transmitting radio messages between individuals, ships, planes, etc.（个人、轮船、飞机之间的）无线电设备; 对讲机：
a ship-to-shore radio.
船岸联络无线电。
1.5
- in names a broadcasting station or channel广播电台（或频道）：
Radio One.
第一套广播节目, 广播一台。
(-oes, -oed)no obj.
1- communicate or send a message by radio用无线电通讯（或发送信息）：
the pilot radioed for help.
飞行员发无线电求救信号。
1.1
- with obj. communicate with (a person or place) by radio用无线电与（人, 地点）通讯：
we'll radio Athens right away.
我们将马上用无线电与雅典联络。
词源
early 20th cent.: abbreviation of RADIO-TELEPHONY.