消防泡沫喷头:The CD key you have enthered is invalid什么意思

The CD key you have enthered is invalid什么意思 cs进入局域网时出来"The CD Key Have Been Used "??????????????????????????????????????? Have you got the disc --Have you closed the door____? do you have the ticket ( )the concert Who have the THANK YOU MV? A : Have you seen the temperature today? have you benn to the great wall? how have you found the course？是什么意思？ I have you the really fine