B2 （正式信函开头对不知姓名的妇女的尊称）尊敬的女士
the usual way of beginning a formal letter to a woman whose name you do not know
Dear Madam, I am writing on behalf of your uncle,Mr James Ross.
Dear Madam, I am writing to enquire whether I might visit you next Saturday.
Dear Madam: This letter is to inform you that your account with us is currently in arrears.
Dear Madam, I hope you enjoyed your recent stay at our hotel.
See also: madam (WOMAN)