Warning: file_put_contents(/www/wwwroot/ppbbu/4cd.cn/cache/1a78c63f756e6352f2569b70708718bc.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/4cd.cn/index.php on line 55 lowest observed frequency是什么意思,lowest observed frequency的翻译,lowest observed frequency音标、读音、用法和例句_沉淀汉英词典