gravel /ˈɡreivl/ n. ［u］ 沙砾：We bought six bags of gravel for the garden path.我们购买了六袋碎石用来铺花园的小路。The steamroller leveled out the gravel roadbed and than the concrete was poured. 蒸汽辗压机先把路基的沙砾辗平，然后才倒下水泥。