dyeing ones hair
染头发
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The study and development of permanent hair dyeing, agent especially about the new harmless ones such as iron salt, plant extracting and Melanin hair dyeing agent are reviewed.
综述了永久性染发剂的研究开发，尤其新型无毒染发剂如铁盐染发剂，植物萃取物染发剂和黑色素类染发剂等。
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