以下为句子列表：
英文: 8 Bryan TM，Englezou A，Gupta J，et al.Telomere elongation in immortal humancells without detectable telonerase activity.EMBO J.1995，14（17）:4240.
中文: 7陈雯，张桥，万德森，等.胃癌结肠癌组织端粒酶活性.中华肿瘤杂志，1998，20（4）:261.
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英文: A 40-base polymorphic repeat sequence located in the 3'-untranslated region of the DAT gene was purified and amplified by polymerase chain reaction (PCR).
中文: 将位于多巴胺运输器基因3'端未转译区段的40-硷基多形性重复序列予以纯化、经聚合酶链锁反应放大。
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英文: A brief introduction to the X-ray crystallographic studies on RNA polymerase Ⅱ complexes and the enzymatic mechanisms revealed by the crystal structures.
中文: 摘要用X射线晶体学方法测定的一系列RNA聚合酶Ⅱ复合物结构揭示了真核转录的分子机制。
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英文: Abstract: Huperzine A has been shown to be a powerful selective inhibitor of acetylcholinesterase and has attracted widespread attention because of its unique pharmacological profile and low toxicity.
中文: 文摘:石杉碱甲是一高效、高选择性乙酰胆碱酯酶抑制剂，由于其独特的药理特征和低毒性,引起了人们的广泛注意。
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英文: Abstract: Objective To investigate telomerase activity in patients with psoriasis.
中文: 文摘:目的探讨银屑病的端粒酶活性表达情况。
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