stratified stone that splits into pieces suitable as paving stones
同义词：flag
flagstone详细解释
flag.stone n.（名词）A flat slab of stone used as a paving material.石板，板石：用作铺路材料的扁平的石块An evenly layered sedimentary rock that can be split into paving stones.薄砂层岩，板层砂岩：一种有整齐分层的能打砸成铺路石的水成岩
