can not connect tologin server-time error

MySQL Error Message:Can not connect to MySQL server Can not connect to MySQL server是什么意思 Can not connect to the ccz server Can not connect to server,please try again later! Can not connect to MySQL server这是什么意思? $halt && $this->halt('Can not connect to MySQL server');这句是什 could not connect to the server是什么意思 Could not connect to any license server. could not connect to the server can not connect gameserver A connect with patch server could not be established can't connect to aut-download server.Please try again