以下为句子列表：
英文: The serum levels of carcinoembryonic antigen (CEA),carbohydrate antigens9 9(CA9 9) and (CA) were measured in cases of benign diseases of the stomach and large bowels and 8 cases of gastric cancer and colorectal cancers.
中文: 对 例胃、大肠良性疾病患者（良性疾病组）及8例胃癌、大肠癌患者（恶性疾病组）血清癌胚抗原（CEA）、糖链抗原99（CA99）、糖链抗原（CA）进行了测定。
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英文: The Cloning and Construction of a Murine-Human Chimeric Antibody with Specificity for Carcinoembryonic Antigen and the High Expression of the Chimeric Genes in E. coli
中文: 抗癌胚抗原单克隆抗体可变区基因的克隆及鼠-人嵌合抗体基因在E.coli中的高效表达
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