2. blackness, darkness specifically darkness of complexion
nigrescence 片语
片语
the nigrescence layer fixation发黑层的固化
technique of nigrescence发黑技术
quick nigrescence快速发黑
Lessonia nigrescence变黑雷松藻
mechanism of nigrescence发黑机理
black黑色的;黑人的;邪恶的
nigrescence 例句
英汉例句
This paper work out a better applied technique of steel normal-temperature quick nigrescence via discussing various factors' influence on the speed of nigrescence and the capability of plating.