The basis for using such a level comes from reports from FDA and FSIS of trace levels of melamine in tissues from some hogs that consumed the suspect feed containing rice protein.

• 根据使用级别这样一个来自美国的报告和安全检验局的微量三聚氰胺各级组织中的一些猪的消费疑犯饲料含有大米蛋白。