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什么是同化、异化和换位？What is assimilation, dissimilation and metathesis?

协议额函数来找到词典中所有的这样的交换对。Write a program that finds all of the metathesis pairs in the dictionary.

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介绍了C_4烯烃歧化的基本原理以及歧化反应用负载型铼基催化剂。The mechanism of C_4-olefin metathesis to produce propylene and the Re-based catalysts for the metathesis were introduced.

置换反应是中学化学中的主要反应，也是典型的氧化还原反应。Metathesis reaction is not only one of the major reactions in secondary school chemistry teaching, but a typical redox reaction.

所有病例术前检查均未发现淋巴结转移及静脉癌栓形成。There were no metathesis of lymph node and tumor extension into the renal vein or vena cava pre-operative examination of all cases.

本演讲概括讨论复分解反应，并且展示为什么诺贝尔委员会把该反应称为“绿色化学”的范例。" The lecture will briefly discuss the metathesis reaction and show why the Nobel committee chose to call it an example of "Green chemistry.

本文扼要地介绍了固态复分解反应法制备陶瓷粉末的基本原理、关键技术、特点及其研究进展。The base principle, key technology, characteristic and progress on synthesis of ceramic powders by solid-state metathesis reactions are described.

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本文综述了近年来环烯烃开环易位聚合研究的新进展，并对这些体系的催化剂作了详细的描述。This paper reviews recent development of cyclic olefin ring-opening metathesis polymerization. The catalyst systems for the polymerization are described in detail.

催化剂经过三十余年的发展终于因“有机合成中复分解反应方法的进展”在2005年获得了诺贝尔化学奖。Catalyst development over a period of more than thirty years led in 2005 to the Nobel Prize in Chemistry "for the development of the metathesis method in organic synthesis."

在十九世纪七十年代初还鲜为人知的烯烃复分解反应，其反应机理就是碳碳双键“断裂”形成所有可能的烯烃，当时，更没有认识到合适的催化剂。The mechanism of the alkene metathesis reaction, in which carbon-carbon double bonds are "cleaved" to give all possible alkenes, was unknown in the early 1970's, and no catalysts had been identified.