backbone road

基本解釋

He slipped end-over-end as the gaps in the road, it is a backbone.
涵管做為道路中的空隙，它是一個脊梁。
The new road is part of the backbone of China's national highway system, scheduled for completion this year.
新的道路是定于今年完工的全國高速公路主干網(wǎng)的一部分。
blog.sina.com.cn
The traffic network composed of four lengthwise and three transverse roads has been built in the Base, including one landscape backbone road with planned overall length of 5 km and width of 35 m.
基地內(nèi)已經(jīng)建成四縱三橫的道路網(wǎng)架，其中一條為規(guī)劃全長5公里，寬為35米的景觀主干道。