gravelyadv.严肃地;庄重地;严重地;沉重地
graveln.碎石v.铺碎石;使困惑
gravel envelope砂砾封皮
gravel material砂砾石料
gravel mattress碎石垫层
gravel concrete砾石骨料混凝土,砾石混凝土
gravel-voiceda.
gravel fraction砾石部分
gravel business砂石业
gravel spreader砾石撒布机
gravel-packing砾石充填
gravel sediments砾石沉积