Research on gallium nitride, a material that showed promise for blue LEDs, began in the late 1960s at the Radio Corporation of America (RCA), which wanted to use LEDs to create flat-panel televisions.是什么意思_Research on gallium nitride, a material that showed promise for blue LEDs, began in the late 1960s at the Radio Corporation of America (RCA), which wanted to use LEDs to create flat-panel televisions.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句