During recording and playback, the OPR (operation) indicator lights or flashes. You can set the OPR indicator to turn off even in operation.是什么意思_During recording and playback, the OPR (operation) indicator lights or flashes. You can set the OPR indicator to turn off even in operation.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句