Warning: file_put_contents(/www/wwwroot/ppbbu/qk12333.com/cache/8435097e3a973c938a2f8cc99cd299e0.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/qk12333.com/index.php on line 55 concentration (n.)是什么意思，concentration (n.)的翻译，concentration (n.)音标、读音、用法和例句_奇客生活牛津词典