1. The natural haematochrome extracted from plum skin is a kind of safe and non - poisonous colorant.
   从李子皮中提取的天然红色素是一种安全无毒的食用色素。
2. If the hair graying is inreversible, hair colorant is the main choice for the masking of hair color change.
   在无法逆转头发变灰的情况下，着色剂是恢复头发颜色的主要方法。
3. This article describes the use of organic colorants as the optical recording media, such as polymethine cyanine, phthalocyanine, naphthocquinone and photochromic compounds.
   介绍了用作光学记录介质的有机染料,如多甲川菁、酞菁、荼醌以及光变色化合物等。

声明：以上例句、词性分类均由互联网资源自动生成，未经过人工审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我们指正。