European biennial formerly grown for the blue coloring matter yielded by its leaves.
欧洲两年生植物，原来用于提取染料的蓝色物质。
Each color lump mainly comprises resin, coloring matter, a solvent and a stabilizer.
色块主要包含有树脂、色料、溶剂和稳定剂。
As ClO2 has great oxidizing power, it can choose to oxidizing lignin and coloring matter, but be less to carbohydrate.
二氧化氯具有很强的氧化能力，能选择性氧化木素和色素，而对纤维素较少损伤。
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