direct dyestuff的用法和樣例：
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.
作者認為稀土對人棉燈芯絨織物在直接染料染色上應用是切實(shí)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.
并借助聯(lián)苯胺類(lèi)直接染料，通過(guò)其還原生成物氧化后的光譜測定，表征了染料還原反應生成的聯(lián)苯胺。
