Using the known positive section as the positive criteria, PBS displaces primary antibody as negative criteria.
以已知阳性片作为阳性对照，以PBS代替一抗作为阴性对照。
The section below will be a difficult one to complete, but it is important to try and change negative attitudes you have about yourself into positive ones.
以下的这个环节是比较难完成的一个环节，但是对将你拥有的负面态度转换成积极的态度是十分重要的。
Studies show that if a pregnant HIV positive woman takes this type of drugs, delivers through a cesarean section, and doesn't breastfeed her child, she will not transmit the virus.
有研究表明，如果一名艾滋病毒阳性孕妇使用此类药物，并采用剖腹产，就不会将艾滋病毒传染给孩子。
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