gravel是什么意思 n. 砂砾, 碎石[医] 沙砾, 尿沙 n. rock fragments and pebblesv. cover with gravel gravel的用法和例句： 1. The gravel removed from his head matched the gravel in the alley. 从他头上提取的砂砾 和巷子里的砂砾吻合 2. Into the gravel cell, the ba...
