gravel是什么意思

gravel

n. 碎石，砂砾；（用于铺路及用作三合土的）砂砾；砂砾层；（医）尿砂; v. 用砂砾铺（地）；<美，...

n.砂砾,砂砾层

decantation freeness keffiyeh smackeroo unicostate wearability