Now we are slowly draining this liquid through filter paper in the pavilion and we almost have our precious indigo pigment.

现在在观心亭里，我们用滤纸过滤液体，就要得到我们珍贵的靛蓝染料了！

youdao

Now we are slowly draining this liquid through filter paper in the pavilion and we almost have our precious indigo pigment.

现在在观心亭里，我们用滤纸过滤液体，就要得到我们珍贵的靛蓝染料了！

youdao