通过改变点火脉冲的振幅和频率，可控制液体发射药的燃烧，从而保持膛内压力峰值，是弹丸维持最大加速度的时间比普通火炮的长。

The Unified Modeling Language is a standard graphical language for modeling object-oriented software（）can show the behavior of systems in terms of how objects interact with each other.

A.Classdiagram

B.Componentdiagram

C.Sequencediagram

D.Use case diagram