聚集经济的主要来源是生产纵向分工和知识溢出。
The main causes of agglomeration economics are vertical division of production and knowledge spillovers.
当不计飞行器的响应时间、纵向加速度和控制溢出时，蜕化为常规比例导引。
Neglecting the time canstants, axial accelerations and the control overflow, the optimal strategy is reduced to the conventional proportional navigation guidance law.
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