以下为句子列表：
英文: An interesting abnormality encountered in many types of tumour is the synthesis of substance normally restricted to fetal life, e.g. α-fetoprotein (normally produced by fetal hepatocytes) by liver cell cancer in the adult.
中文: 在许多类型肿瘤中出现一种使人关注的异常，是合成在正常情况下限于胎儿期形成的物质，例如成人肝细胞癌产生甲胎蛋白（在正常情况下，由胎儿肝细胞产生）。
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英文: Serum alpha-fetoprotein (AFP) and beta-human chorionic gonadotropin (β-HCG) levels were elevated.
中文: 外科手术切除部份肿瘤并做病理检查发现符合为胚胎瘤的变化。
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