瓷砖有各种各样的颜色和图案。
一系列各种各样的颜色和图案都有。
多年来研究者们一直致力于开发一种与猫眼石一样有散射特性的合成材料,他们在各种各样的材料中蚀刻图案,但是都无功而返。
For many years researchers have been trying to develop a synthetic material with the same light-scattering properties as an opal, by etching patterns into various materials. That approach has failed.
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