求翻译：为了延长食品保质期，在其生产工艺过程中，采用茶多酚、亚硝酸钠、纳他霉素、乳酸链球菌素、山梨酸钾等防腐剂进行防腐研究是什么意思？

To prolong the shelf life of food in their production process , using polyphenols , sodium nitrite , Natamycin , Nisin , potassium sorbate preservative anti-corrosion research

In order to extend food warranty period is over, in its production process, the tea polyphenol, nitrite, natamycin, lactic acid of Streptococcus suis, sorbic acid potassium preservatives in corrosion research

In order to lengthen food to guarantee the nature time, in its production technological process, picks has tea the polyphenol, the sodium nitrite, accepts his antiseptics and so on mildew element, lactic acid hammer rhzomorph, sorbic acid potassium conducts the anticorrosion research

To prolong the shelf-life of food, in the course of its production, by tea polyphenol and sodium nitrite, Natamycin, such as nisin and potassium sorbate preservative preservative study

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