crust of iron

• 铁渣

crust of iron的用法和样例：

例句

1. Leaching of arsenic from arsenic and iron slag obtained from cobalt metallurgy with sodium hydroxide has been studied.
   研究了用氢氧化钠浸出钴冶金过程中产出的高砷铁渣中的砷。
2. The best presidents are like magnets below a piece of paper, invisibly aligning iron filings into a new pattern of their making.
   最好的总统，就像放在纸下面的一块磁铁，虽然看不见，但会吸引铁渣形成新的图案。