postage due短语¹³¹⁶²⁰⁺³ 基本例句 欠资 邮政 The most important functions of the system is the functions for cutting down postage due, stopping the hostile mass sending mobile message, depressing cheat by mobile. 突出体现“群发短信的自动监控程序”，在遏制恶意短信群发、控制欠费、打击诈骗中发挥的重要作用。 cnki