User state invalid.

User state invalid. Error!Invalid user name or password Invalid User ID/Password 什么意思? Login Failed.Invalid user name and password combination The user name you entered is invalid.Please try again. 550 Invalid User: 啥意思请大师帮忙翻译 Invalid ORA-01747:invalid user.table.column,table.column,or column specification user Statement state=DataBaseManager.getStatement();String uuid=UUID.randomUUID().toString();String sql = insert into usere values('+uuid+','+user.getName()+','+user.getPassword()+',+user.getAge()+,'+user.getSex()+');int result=state.executeUp Error!Invalid user name or password是什么意思啊Can't remember your user name or password?Enter your email address below and it will be sent to you. [email protected] SMTP error,RCPT TO:550 Invalid User我在发邮时被退回,出现这样的字样, Another question might be if we should trust that we didn't reach an invalid state...Another question might be if we should trust that we didn't reach an invalid state? And if we against all odds did reach an invalid state 这句话什么意思啊? State state state 550 Invalid User:[email protected] (in reply to RCPT TO command).这是邮件退信的原因我等着教照片呢! said:550 Invalid User:[email protected] (in reply to RCPT TO command).发送邮件被退信,然后讲这个是退信的原因.看不懂.帮忙翻译下子.谢啦.^ ^