lettersn.信；字母名词letter的复数形式.lettern.信；字母v.写下；印刷n.租赁人letter of credit at sight即期信用证letter of acknowledgement确认信-COMMA-回函letters and visits system信访制度letter of conservatorship法院发出的监护人证书letters of administration[律] 遗产管理证书.n.[律] 遗产管理证书letters of correspondence尺牍文Letters from an Old Friend好友的来信letter of credit extension信用状延期letters - and - visits信访letters written to his son给儿子的信