In the early 1920s, the airwaves were buzzing with radio signals, all amplitude modulated (AM).
In the early 1920s, the airwaves were buzzing with radio signals, all amplitude modulated (AM).
在20年代初期,电波嗡嗡叫以无线电信号,所有高度被调整(上午)。
In the early 1920s, the airwaves were buzzing with radio signals, all amplitude modulated (AM).
在20年代初期,电波嗡嗡叫以无线电信号,所有高度被调整(上午)。