Track bed
01
轨道床, 道碴层
the layer of stones or other material on which the railway tracks are laid
例子
The train ran smoothly because the track bed was well-maintained.
火车运行平稳，因为轨道床维护得很好。
Workers inspected the track bed for any signs of damage after the storm.
工人们在风暴后检查了轨道床是否有损坏的迹象。
