新建输电走廊，或者扩建现有线路的项目审批越来越困难和旷日持久。
It is becoming increasingly difficult and time-consuming to obtain the permits to building new transmission corridors, or even expand existing ones.
提高重轨质量和单重以增加列车载重和车速，扩建现有轨梁轧机，可以满足2000年前需要。
The demand up to the year 2000 can be satisfied by improving quality and raising the weight of rails and by expanding existing rail-and-beam mills.
到那时，现有的铁路网系统将会被扩建大约20000km,总长将超过110000km。
By then, the existing system will have been expanded by about 20, 000km to more than 110, 000km.
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