Warning: file_put_contents(/www/wwwroot/ppbbu/n94.cn/cache/af0564a45b574eed61c347462ead6652.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/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