墨尔本PTE 阅读排序 2971

A. Indigo dye was used around the ancient world in fabrics created from Egypt to China to Meso and South America.  
B. Indigo gets its name from the plant Indigofera tinctoria and its relatives, which supply the dye that makes fabric the rich, beautiful color between blue and violet.  
C. But when a conservator carefully washed the fabric, the true colors reappeared.  
 
D. The artifacts were discovered at Huaca Prieta, a ceremonial mound on the coast in northern Peru, but their color was initially hidden by the grey tones that had leached into them from the materials used in the mound itself.  
E. And it’s in South America that researchers recently found the oldest known example of fabrics dyed with indigo.