In the old days, when the audience had opinions, they would write or call the station, and their opinions would only be aired if the shows 'hosts mentioned them. The audience couldn't express their opinions directly on air, and couldn't make song requests.
在舊時代做節目，聽眾有意見，寫信或打電話來，只能由主持人傳達，聽眾的聲音不能直接播出去、也不能點歌。