吃透英语课本，提升在校竞争力
n. 靛青；靛蓝
复数：indigoes
复数：indigos
'The vinegar sets the indigo and keeps it from fading,' he says.
他说，醋可以使靛蓝变稳定，防止牛仔裤褪色。
The indigo plant was highly valued until the discovery of chemical dyes in the 19th century.
植物靛蓝在当时的欧洲非常昂贵，直到19世纪化学染料的出现。
The indigo sky was breathtaking at dusk.
傍晚时分，靛蓝色的天空令人叹为观止。
indigo blue
n. [化]靛蓝；紫蓝色
n.[染料]靛蓝，靛蓝染料；靛蓝色；槐蓝属植物
thumb blue
anil
