N crushed rock, broken stone, etc, used to construct a road 铺路石
It can be a reference to pave road metal for other passenger railway and high speed railway.
可供客运专线及高速铁路道碴铺设时借鉴。
The buses crashed through a metal railing and hung precariously over Interstate 5 for several hours before tow trucks pulled them back on the road.
两辆公共汽车撞穿了一根金属栏杆，摇摇欲坠地悬挂在5号州际公路上；几个小时后，拖车将它们拖回到公路上。
A BLUE metal fence runs through Zango, a commuter town along the main road out of Luanda, Angola's capital.
沿着安哥拉首都罗安达外的一条主干道，有一个叫Zango的卫星镇，一个铜硫层贯穿其中。
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