这代表了一种富氢母源形成轻烃的特征。
This represents characteristics of light hydrocarbons which are generated from rich-hydrogen source rocks.
灭活苗可以中和剩余的母源抗体，或更易于激活机体免疫力的产生。
It is felt the killed vaccine either neutralize the remaining maternal antibody or just more easily starts the development of immunity.
这样，大量原本认为已经拥有有效母源抗体的商品肉鸡，没有拥有足够的有效抗体水平。
As a result a significant number of broiler chicks are hatched with little or no protective antibody from breeders thought to be protected.
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