Warning: file_put_contents(/www/wwwroot/ppbbbu/5356789.com/cache/72a838ccd0bd81f7464bbc91c8c8d330.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/5356789.com/index.php on line 55 m-type backward-wave oscillator是什么意思，m-type backward-wave oscillator的翻译，m-type backward-wave oscillator音标、读音、用法和例句_零六五六深蓝词典