The US ordered the products to be stopped at its borders unless importers certify them to be either free of dairy products or melamine.
美国把这些产品滞留在边界，除非进口商能证明这些产品不含奶制品或三聚氰胺。
Infant formula sold to U. S. consumers must be completely free of melamine.
销售给美国消费者的婴儿配方奶粉必须完全不含三聚氰胺。
Officials also stressed that infant formula sold to U. S. consumers must be completely free of melamine.
官员们还强调说，售于美国消费者的婴儿食品必须完全不含三聚氰胺。
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