求翻译：随着电网建设的发展，架空线路不断增多，特别是由于规划部门对土地审批越来越严格，线路通道在很多地区已经成为影响电网建设的主要因素,因此，有必要对架空电力线路的电场、磁场和辐射进行研究是什么意思？

With the development of power grid construction, overhead lines continue to increase, especially due to the planning department for approval of the land more and more strict, the line channels in many areas has become a major factor affecting power grid construction, therefore, it is necessary to ov

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Development constructs which along with the electrical network, the overhead line increases unceasingly, because the plan department more and more is specially strict to the land examination and approval, the line channel already became in very many areas affects the primary factor which the electri

With the development of power network construction, increasing overhead lines, especially due to the Planning Department on land disposal more stringent, line channels in many areas has become the main factors affecting the power grid construction, therefore, the need for overhead power lines of the

With the development of power grid construction, overhead lines continue to increase, especially due to the planning department for approval of the land more and more strict, the line channels in many areas has become a major factor affecting power grid construction, therefore, it is necessary to ov