求翻译：　　为了在整个规划期内，随着业务的发展和网络扩展，频率分配能有计划、有步骤地顺利进行，避免频繁大量地改动，频率规划要本着后服从于先的原则(在不同区域的边界)，先远期后近期的顺序统筹、协调地进行。是什么意思？

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In order to in the entire plan time, expands along with the service development and the network, the frequency allocation can have the plan, have the step to carry on smoothly, avoids massively modifying frequently, the frequency plan must obey in line with after in the first principle (in different

For the entire planning period, with the development of business and network expansion, frequency assignment can proceed smoothly in a planned and systematic way, avoid frequent large changes frequency plan to obey the principle of first (in different areas of the border), the first forward and then