So, milk contains large quantities of this special class of antibodies called secretory IgA.

所以,乳汁中含有大量,这类特殊的,称为分泌型IgA的抗体

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Products and services were designed and sold to segments in the large band of people we called a middle class market.

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In the case of a newer drug class called biologics, the cost could be even higher, as they are highly complex large-molecule medicines that cannot be easily produced.

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