动词变黑,致黑; (使)变黑,把…弄黑( blacken的现在分词 ); 发暗; 败坏(名誉等),诋毁
1. 黑化:常用赤血盐碱簿法,先用赤血盐(铁氰化钾),使银影氧化为亚钦氰化银,再用硫代硫酸钠进行溶解,达到减薄的目的,其作用过程为:黑化(blackening) 用硫化钠溶液增加底板的密度,底板经过加厚处理,如密应仍不够,可用硫化的流布板面.
2. 染黑法:barrel tumbling 滚筒打光 | blackening 染黑法 | blue shortness 青熟脆性
3. 黑道:black ash spruce(Picea nigra Link.) 黑云杉 | blackening 黑道 | blade 刀口;桨叶
1. blackening
1. Strong winds blew smoke and ash over the capital, blackening the evening sky and turning the rising moon red.
2. The soils amassed in dark clouds, blackening sky and forcing the exodus of millions at the time.
noun
1. changing to a darker color
Synonym: darkening