目的：用基因工程技术生产大量重组CB，为研究CB的生物学特性和制备CB抗体供临床检测作准备。

Aims: To obtain enough recombinant CB by using genetic engineering technique for studying its biological characteristics and obtaining its antibodies for clinical detection.

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现就其生物学特性和临床意义作简要综述。

This review introduces the biological character of PAPP-A and its clinical meaning.

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目的：探讨三阴性乳腺癌患者的临床病理特点、分子生物学特性、生存率以及影响预后的因素。

Objective: to analyze the clinicopathological features, parameters of molecular biology, survival rate, and prognostic factors in triple-negative breast cancer patients.

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