发黑

Cassie found it necessary to explain her blackened eye.

凯茜发现有必要下她发黑眼睛。

She looked old and thin with sunken cheeks and hollow eyes.

她看去又老又瘦, 脸颊凹陷, 眼圈发黑。

With regards to the surface treatment, our crafts include nigrescence, phosphorization, zinc plating, dacromet, nickel plating and copper plating.

表面处理有发黑、磷化、机械镀锌、达克罗、镀镍、镀铜等工艺。

He landed catfooted on the blackened streak—still hot enough to scorch his boots—that his landing had gouged into the deck.

他轻轻落到大片由迫降带摩擦出发黑焦痕，其温度之高仍然足以烫焦他靴子。

In addition, non-coated paper in high-humidity environment of sulfide, chemical pulp and fill applicatron dottle out acid melted, making of gold and silver monlchamus nigrescent who lose their luster.

此外，否涂料纸在矮湿度境况下，化学纸浆硫化物以及增添料洋磕酸矾土感化，也会使纸金、银不朱发黑而获得光华度。