Warning: file_put_contents(/www/wwwroot/ppbbu/laei.cn/cache/40f73cef4246809509647cf88b58dd8c.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/laei.cn/index.php on line 58 covert operation是什么意思，covert operation的翻译，covert operation音标、读音、用法和例句_按摩法牛津词典