road-metal (also metal)

n [U] broken stone used for the making and repairing of roads 筑路和修路用的碎石; 道砟.

rivulet, riyal, rly, RM, RN, RNA, RNIB, RNLI, roach, road, road safety, road sense, road show, road tax, road test, road to, road-block, road-hog, road-house, road-mender, road-works, roadblock, roadie, roadrunner, roadside, roadway, roadworthiness, roadworthy, roam, roamer, roan, roar, roaring, roast, roaster, roasting, rob, rob sb. of sth., robber, robbery,