direct color的用法和樣例：
例句
- Effects of calcining temperature and dosage of salt sludge absorbents on color removal were studied.
采用氯堿工業(yè)的含鎂鹽泥對直接染料廢水進(jìn)行脫色處理。 - 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。
