Warning: file_put_contents(): Only 0 of 4967 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/oclz.com/index.php on line 55 observation and signal element是什么意思，observation and signal element的翻译，observation and signal element音标、读音、用法和例句_菜篮子兴趣思朗文词典