roadbed
音標['r?udbed] 讀音漢語翻譯
n. 路基
英文解釋：
名詞 roadbed:
- a bed supporting a road
例句：
- A foundation of crushed rock or a similar substance for a road or railroad; a roadbed.
詳細解釋：
road.bed
n.（名詞）
The foundation upon which the ties, rails, and ballast of a railroad are laid.路基：其上可鋪鐵道的枕木、鐵軌和道碴的地基A layer of ballast directly under the ties.道碴：直接鋪在枕木下的石碴The foundation and surface of a road.公路地基和公路路面
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