常见例句雙語例句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.白沙國家公園的白沙灘的沙丘是由石膏組成的，據悉，此類石膏是一種由水蒸發後畱下的鑛物。 返回 evaporite mineral