Then in 1920, a radio station in Pittsburg began to make regular broadcasts of speech and music, and the general public began to buy radio receivers.是什么意思_Then in 1920, a radio station in Pittsburg began to make regular broadcasts of speech and music, and the general public began to buy radio receivers.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句