graveln.碎石v.铺碎石;使困惑
gravel stone砾石
gravel soils碎石土
gravel earth砾石土
gravel plain砂砾平原
gravelly clay砾质粘土
gravelliferon芸香(酚)内酯, 芸香酮
gravel tunnel卵砾石层隧道
gravel pebble小卵石
gravel-soil碎石土
gravelly loam砾质壤土