| 单词 | roadbed |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔bed〕A foundation of crushed rock or a similar substance for a road or railroad; a roadbed.路基：碎石或类似物质做的道路或铁路的基础；路基美国传统〔metal〕To cover or surface (a roadbed, for example) with broken stones.用碎石来铺设（如公路）的表面美国传统〔road metal〕Crushed or broken stone, cinders, or similar material used in the construction and repair of roads and roadbeds.筑路碎石：用于筑路和修路的压碎或碎裂的石块、煤渣或类似材料美国传统〔road〕The surface of a road; a roadbed.路的表面；路床美国传统〔washout〕Erosion of a relatively soft surface, such as a roadbed, by a sudden gush of water, as from a downpour or floods.冲刷：相对松软表面的冲刷，如路基被源于暴雨或洪水的水流冲刷美国传统 |
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