road bed的用法和樣例：
例句
- With the Ballastless track technology extensive used, the problem of the track on solid bed damage and rectification is paid more and more attention now.
摘要隨著無碴軌道技術的廣泛運用，整體道床產生的病害及維修問題也越來越引起重視。 - The new rail is is being loaded onto the track bed.
軌道路基上正在裝新的鐵軌。 - There is a special tool to impact the road when it is under construction so the base is solid.
有種特殊的工具可以在道路修築過程中將路面壓緊，因此，路基是結實的。
