The traffic network composed of four lengthwise and three transverse roads has been built in the Base, including one landscape backboneroad with planned overall length of 5 km and width of 35 m.
基地内已经建成四纵三横的道路网架，其中一条为规划全长5公里，宽为35米的景观主干道。
2
This curriculum of one to two day courses forms the backbone of the training initiative, with training road maps for the different roles.
一到两天的培训课程帮助学员了解培训课程的主干，包括针对不同角色的培训路线图。
3
The new road is part of the backbone of China's national highway system, scheduled for completion this year.