求翻译：　1、含三大致癌物质之一：亚酸盐（防腐和显色作用）。2、含大量防腐剂（加重肝脏负担）。是什么意思？

　1, with one of the three carcinogenic substances: mild acid salts (corrosion and colour effects). 2, with a large number of preservatives (increase the burden of liver).