natural pigment的用法和樣例：
例句
- They used only natural pigments to dye the wool.
他們只用天然顏料染毛織品。 - Due to the use of natural pigments, Dong Ho folk paintings retain their color well.
因使用天然顏料，東湖村的傳統畫將自然原色保存的很好。 - It provided new method for distilling of natural edible pigment.
為天然色素的提取提供了一條新的途徑。 - Conclusion The black rice pigment is more stable than amaranth and grape pigments.
結論黑米天然色素的光穩定性優於莧菜紅和葡萄紅天然色素。
