air waves
柯林斯词典
1. N-PLURAL The airwaves is used to refer to the activity of broadcasting on radio and television. For example, if someone says something over the airwaves, they say it on the radio or television. 无线电波[journalism]
The election campaign has been fought not in street rallies but on the airwaves. 这场竞选大战不是在街头集会中进行，而是在无线电波中交锋。
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