单词：direct dye
direct dye的用法和样例：
例句
- It is shown that the application of rare-earth elements to staple rayon corduroy direct dye dyeing is practicable and the effect is perfect.作者认为稀土对人棉灯芯绒织物在直接染料染色上应用是切实可行的，效果是理想的。
- In addition, rapid colorimetric determination of benzidine compounds released from photo-assistant reduction of selected direct dyes was also conducted.并借助联苯胺类直接染料，通过其还原生成物氧化后的光谱测定，表征了染料还原反应生成的联苯胺。
- substantive dye直接染料
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