bulb blackening 灯泡变黑 ; 玻壳黑化
blackening & phosphating treatment 铁件发黑及磷化处理
relative blackening 相对黑度
blackening bath 加厚液
blackening of teeth 牙齿焦黑
sulfide blackening 硫化黑变
blackening agent 发黑剂
A new process of electroless blackening on aluminum alloy was developed.
开发出一种铝合金化学发黑新工艺。
参考来源 - 铝合金化学发黑新工艺·2,447,543篇论文数据，部分数据来源于NoteExpress
V-T/V-I To blacken something means to make it black or very dark in colour. Something that blackens becomes black or very dark in colour. 使变黑; 变黑
The married women of Shitamachi maintained the custom of blackening their teeth.
下町的已婚妇女保留了染黑牙齿的习俗。
V-T If someone blackens your character, they make other people believe that you are a bad person. 诋毁
They're trying to blacken our name.
他们在设法败坏我们的名声。
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