Warning: file_put_contents(/www/wwwroot/ppbbbu/n94.cn/cache/2533002482d080132d84270f839a9616.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/n94.cn/index.php on line 55 conical envelope surface是什么意思，conical envelope surface的翻译，conical envelope surface音标、读音、用法和例句_94生活常识网有道词典