Averaged across years of data, this reveals periodic patterns, including seasons.

对多年数据进行平均，这揭示了周期性模式，包括季节。

The ordered structures that cause iridescence in opals are called photonic crystals, a kind of crystal where the bending and reflecting of light is happening in three dimensions in a periodic or repeated pattern.

在蛋白石中产生彩虹色的有序结构被称为光子晶体，一种以周期性或重复模式在三维空间内弯曲和反射光的晶体。