griseoflavin

例句：

1. 1.The sky was a deep shade of grey.
   天空是深灰色的。
2. 2. The old building is covered in a layer of grey ash.
   这座旧建筑覆盖着一层灰烬。
3. 3. The grizzly bear's fur is a mix of brown and grey.
   灰熊的皮毛是棕色和灰色的混合。