The heart of the system, op amp A1C, includes photoresistor RPR, which represents the feedback element that determines the gain of the stage.是什么意思_The heart of the system, op amp A1C, includes photoresistor RPR, which represents the feedback element that determines the gain of the stage.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句