The original white lead pigments have oxidized and turned black.

原来白色的铅颜料已经氧化发黑了。

The colouring pigments from the skins are not allowed to bleed into the grape juice.

这些果皮的色素不允许掺混进葡萄汁中。

A transparent animal doesn't have pigments, so its tissues won't absorb light.

透明生物的体内没有色素，因此它的细胞组织不吸收光线。

The Romans used natural pigments on their fabrics and walls.

罗马人使用天然颜料染布和刷墙。

They also absorb strongly in the UV-C, suggests that they might have originally acted as antenna pigments.

它们对 C 类紫外光中也有很强的吸收能力，这表明它们最初可能是天线色素。