n.光球；光球层
The photosphere has a granular structure. 光球还有颗粒结构。
The chromosphere is a frothy layer churned up by gases in the photosphere. 色球层在光球层气体的搅拌下是个多泡层。
The brightness of the photosphere prevents people from seeing the outer layer of the sun's atmosphere. 光球层的亮度阻止了人们看到太阳大气层的外层。
