以下为句子列表：
英文: 2 Petroleum crude oil: Refers to naturally occurring crude oil that is mixtures of hydrocarbon compounds that contain mainly paraffin hydrocarbon, cycloparafin hydrocarbon, and aromatic hydrocarbon.
中文: 二石油原油：指一种源于自然界之原油，为碳氢化合物之混合物，其主要成分为石蜡烃、环烷烃、芳香烃等。
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英文: A review on application of monohydrated sodium bisulfate as catalyst in synthesis of ester, such as monocarboxylic esters, dicarboxylic esters, chloroacetates, hydroxycarboxylic esters, aromatic esters and the reusability of sodium bisulfate with.
中文: 摘要介绍了一水硫酸氢钠在催化合成酯（如一元羧酸酯、二元羧酸酯、氯乙酸酯、羟基酸脂、芳香酸酯）中的应用及其重复催化性能。
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英文: 【Characteristic 】 This product is yellowish-brown piece of adhesive plaster with aromatic smell.
中文: 本品为黄褐色的片状贴膏剂，气芬香。
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英文: A series of compounds containing tetrahydropyrimidinone ring were synthesized via condensation of asparagine t -butyl ester with aromatic aldehydes and amino acid chlorides.
中文: 由苯甲醛或取代苯甲醛与天冬酰胺叔丁酯和氨基酸酰氯的环化缩合反应合成了一系列四氢嘧啶酮衍生物 ,由核磁共振测定了产物的构象和构象转化的活化自由能。
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英文: A STUDY OF THE LIQUID CRYSTAL PROPERTIES OF THERMOTROPIC WHOLLY AROMATIC COPOLYESTERS Ⅰ. EFFECT OF BENDING UNITS
中文: 热致性全芳香族共聚酯液晶的研究——Ⅰ.弯折键的影响
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