ruddle

teacher: boys, i have a ruddle for you. it has a beautiful feather, and it can wake you up every morning. what is it, tom?

老师：“男孩们，我有一个谜语给你们猜：它有漂亮的羽毛，并且它可以在每天早上叫醒你。它是什么，汤姆？”

chinese codex(2000 edition)said that processing of ruddle is to calcine it thoroughly and quench with vinegar and grind it into meal.

《中国药典》2000年版规定，对代赭石的炮制要用“煅至红透，醋淬，碾成粗粉的方法”。

investigative datum confirm, the content of alo(oh) 3 bauxite in ruddle is very high many ruddle have attained industry require.

研究资料证实，红土中的三水铝石含量甚高，不少地段已达到工业利用的要求。

discussion of best ways of processing ruddle

中药代赭石最佳炮制方法探讨