| 单词 | roadbed |
| 释义 | roadbed['rəudbed]n. 路基 roadbed road.bed AHD: [r½d“bµd”] D.J. [6r*&d7bed]K.K. [6rod7bWd]n.（名词）1. The foundation upon which the ties, rails, and ballast of a railroad are laid.路基：其上可铺铁道的枕木、铁轨和道碴的地基2. A layer of ballast directly under the ties.道碴：直接铺在枕木下的石碴3. The foundation and surface of a road.公路地基和公路路面 |
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