常见例句双语例句The sand that makes up the dunes in White Sands National Monument are made of gypsum, an evaporite mineral left behind when bodies of water dry up.白沙国家公园的白沙滩的沙丘是由石膏组成的，据悉，此类石膏是一种由水蒸发后留下的矿物。 返回 evaporite mineral