Username 什么意思?

Username 什么意思? String userName=request.getParameter(userName);什么意思 this username is available什么意思? username should contain alphabets,numbers什么意思 Username unavailable 意思请问Username unavailable是什么意思? Your username or password is incorrect什么意思? The username or password you entered is incorrect什么意思 Username can only contain letters,numbers and underscoress什么意思 login failed,incorrect username or possword什么意思 username username@examplecom是甚么意思 wrong username or password是怎么意思 带有replace的这句话是什么意思,有什么意义address=request.form(address)address=replace(address,',)username=request.form(username)username=replace(username,',)username=replace(trim(request(username)),',)例如,下面的 username是什么意思?请知道的人告诉我一下好吗?username中文意思.谢谢了~~~~~~~~~~~~~~~~~~ Error:The username is already taken.中文意思 please use your username to login 中文啥意思 Sorry,your selected username 1591141479 is taken啥意思 这句话的单引号什么意思?SqlCommand cmd = new SqlCommand(select * from login where username = ' + this.TextBox1.Text.Trim() + '