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。
Quite significantly, there was no blackening of the emulsion at the mirror's surface .
十分引人注意地，在反射镜表面的乳胶没有变黑。
A kind of the steel blackening agent performance satisfactorily was developed.
研制了一种性能优良的钢铁常温发黑处理剂。
Even the Americans are guilty of blackening business's name.
甚至连美国人都对丑化商业负有责任。
Even the Americans are guilty of blackening business's name.
甚至连美国人都对丑化商业负有责任。
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