A topic is a unit of information that describes a single task, concept, or reference item.
主题是一种信息单位，描述了一项任务、一个概念或者一个参考条目。
It incorporates active radar with an inertial reference unit and micro-computer system, which makes the missile less dependent upon the fire-control system of the aircraft.
它把主动雷达和一个被动参考单元以及微电脑系统结合在一起，可使得导弹更少的依靠飞机上的发射控制系统。
Return to the composition unit panel (figure 3) and repeat the same steps to configure the reference.
返回到组合单元面板(图3)，并重复相同的步骤来配置引用。
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