In May of 1940, the Federal Communications Commission formally allocated the 42-50 megahertz band to FM radio broadcasting, and applications for the new service poured in.是什么意思_In May of 1940, the Federal Communications Commission formally allocated the 42-50 megahertz band to FM radio broadcasting, and applications for the new service poured in.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句