'two rings' means the 16 m-width road and 10-20 m-width green belt, which supplies leisure and rambling place for the residents in the Area;

“双环”指沿核心区边缘形成16米道路和10-20米的林荫带绿环，为本区居民提供休闲漫步的最佳场所；

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The road was reduced to 18 ft in width by adding parking bays.

这条路增加了停车区域后，宽度减少为18英尺。

《柯林斯英汉双解大词典》

Its passenger compartment spans the width of two traffic lanes and sits high above the road surface, on a pair of fencelike stilts that leave the road clear for ordinary cars to pass underneath.

立体快巴的乘客们相隔的跨度为两条车道的宽度，并高坐于道路表面上方高耸的支架栏杆上，这使得普通的汽车可以在下边畅通无阻。

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"A researcher I was speaking to recently reckons green walls in urban canyon environments (areas where walls are higher than the width of the road separating them) are more effective than trees at collecting particles because the way the wind eddies around and then moves down the wall, " Laurence said.

CNN: Green walls create new urban jungles