All these demonstrate that sulphites have become one of major contaminations in aquatic products.

综合检测结果表明,亚硫酸盐污染已经成为水产加工品的主要污染因素之一.

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The residues of sulphites in products differ owing to the different processing method and adding amounts.

制品中亚硫酸盐的残留量因加工方式和添加量而异.

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