The regulator demanded instead that Ms Dashtaki set up a "Grade a" dairy plant, just as a large factory processing raw milk would be required to do.

管理者要求Dashtaki女士建立一座“A级”乳制品工厂，就如大型生牛乳加工厂所要求的那样。

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Grade a milk is the best quality.

等级的牛奶品质最好。

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On the other hand, lactoperoxidase system could all improve the hygienic grade about 1 or 2 grade, and could not affect the nutrition composition of the preserved milk.

另一方面，乳过氧化物酶体系均可提高保鲜牛乳1～2个卫生等级，并且对其营养成分没有影响。

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Grade A is for use in fluid milk products as well as any other dairy products, whereas Grade B which meets slightly lower standards, can only be used for manufactured dairy products, like cheese.

FORBES: Why Milk Isn't As "Natural" As You Think

The grade given depends on the milk meeting certain sanitary or quality standards.

FORBES: Why Milk Isn't As "Natural" As You Think

Historically, two grades of milk were established: Grade A and Grade B.

FORBES: Why Milk Isn't As "Natural" As You Think