n.密码电话学...

Telephone communications which are protected against compromise through use of an approved ciphony system.通过使用有效的密码电话系统,保护电话通信不被泄漏....

ciphony的音标：ciphony的英式发音音标为：['saɪfənɪ]ciphony的美式发音音标为：['saɪfənɪ]...