常見例句雙語例句Do you know the Opal?It is kind of precious stone .你知道這個泊?它是一種寶石。26921.comThis process can be observed in the vibrant colours of the precious stone opal, a natural photonic crystal.在珍貴的蛋白石中可以觀察到這一顏色變化的過程，蛋白石是一種天然的光子水晶。chem8.org 返回 precious opal