以下为句子列表：
英文: Abstract: A high performance liquid chromatography (HPLC) method for determing the 2,4-/2 ,6- isomer ratio in commercial. toluene diisocyanate (TDI) was developed.
中文: 文摘:建立了测定工业甲苯二异氰酸酯中2，4-和2，6-体异构比的液相色谱法。
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英文: Abstract: In this paper,the pollution sources and the hazards of the pollutants in nitrotoluene production are briefly described,the various approaches for reducing and eliminating the pollution by adoption of cleaner production are outlined.
中文: 文摘:简介一硝基甲苯生产过程中污染物的产生和危害，概述了采用清洁生产技术减少和消除污染的各种途径。
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英文: Abstract: Nano TiO2 was dip-coated on active air purification sieve of active carbon.The purification effect of this sieve against various polluting gases were investigated.The result showed that purification effects on H2S,NH3,HCHO,CO,and toluene were no
中文: 文摘:采用浸涂法在活性炭空气净化网上负载纳米二氧化钛，在紫外光的照射下，净化网对一氧化碳、甲醛、硫化氢等污染物的净化能力明显增强，对比实验表明，在紫外光照射下光催化剂使被吸附的污染物发生降解反应而提高活性炭的净化能力。
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英文: Abstract: The principal development of the study on chemical conversion of nitrogroup derivatives for the toluene was summarized at first based on this review,Described herewith are reaction mechanisms and effects substituents and concluded four methods a
中文: 文摘:在这篇文章中，首先综述了甲苯硝基衍生物研究的进展，根据这一评论详细地说明了化学转化机理和取代基效应，并对硝基甲苯的选择性氧化进行了简单评述。
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英文: A Comparative Study of the Cytogenetic Effects of Benzene, Toluene and Xytene
中文: 苯、甲苯、二甲苯细胞遗传学效应的比较研究
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