以下为句子列表：
英文: Abstract: Knowledge is not only an endogenous variable, but also an exogenous variable, which is the base to understand the characteristic of the increasing or decreasing return of hi-tochnology in knowlodgc-bascd cconomy.
中文: 文摘:知识既是内生变量，又是外生变量，这是理解高科技知识报酬递增与递减特点的基础。
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英文: Abstract：This review introduced the research process of the establishement of genetic transformation system in Maize. The method and integration and expression of exogenous genes were also discussed.
中文: 摘要本文介绍了近年来玉米遗传转化系统的建立、基因导入手段、方法等方面的研究进展。
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英文: After the foundation of new China, the urban and rural income disparities showed as factitious and exogenous ones, which was due to the national system plan, governmental development stratagem in economy and concerning policies.
中文: 摘要建国以来，中国城乡收入差距表现为人为的、外生性城乡差距，是由国家的制度安排和政府的经济发展战略及其相关的政策决定的。
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英文: Blood stasis can be caused either by asthenia and stagnation of qi, blood-cold and blood-heat or by endogenous and exogenous injury and extravasation of blood due to blood-heat.
中文: 瘀血或由气虚、气滞、血寒、血热等原因所造成，或由内外伤或血热妄行等原因所引起。
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英文: By treating exchange rate, Taiwan's gold price and world's gold price as endogenous variables and treating other variables which affecting exchange rate, Taiwan's gold price and world gold price as exogenous variables, the paper constructs simultaneous eq
中文: 在联立方程式方面，本文之实证乃是以美元汇率、台湾黄金价格与世界黄金价格作为内生变数，并以影响此三个内生变数之相关经济因素做外生变数，然后建立联立方程式模型，以探讨黄金市场与外汇市场之互动关系。
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