The original white lead pigments have oxidized and turned black.
原来白色的铅颜料已经氧化发黑了。
The painting is the only piece of art saved from the original White House that burned down.
这幅画是以前的白宫烧毁时唯一救出来的艺术品。
The drugs used if the original spot with very good control, so the original white area has decreased.
而如果是所用药物对原有白斑有了很好的控制作用,使原有白斑面积有所减少。
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