以下为句子列表：
英文: AIM: To study the content alteration of bacterial endotoxin in the exudant from the root canals of periapical treated with calcium hydroxide as intracanal medicament.
中文: 摘要目的：检测氢氧化钙封药前后尖周病患牙根管内细菌内毒素的变化。
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英文: After partial esterification of alkylpolyoxyethylene ether with citric acid, the reaction mixture was neutralized by sodium hydroxide to produce the salts of the partial esterification products.
中文: 摘要将脂肪醇聚氧乙烯醚和柠檬酸进行部分酯化反应，生成脂肪醇聚氧乙烯柠檬酸酯，再中和成钠盐。
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英文: And the characteristic of special morphological magnesium hydroxide are narrated emphatically, also the application research situation as fire retardant at home and abroad are introduced.
中文: 重点评述了特殊形貌氢氧化镁的特点，及其作为阻燃剂在国内外的应用研究现状。
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英文: By repeating these simple kinds of reactions—adding a carbonyl group here or a hydroxide group there—we can synthesize a rich variety of complex organic molecules.
中文: 我们重复这些简单的反应步骤，在这儿塞入一个羰基、那儿接上一个羟基，便可合成种类丰富、构造复杂的有机分子。
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英文: And the Hoffman degradation would be efficiently carried out at 7 ℃ in . % sodium hydroxide solution.
中文: 霍夫曼降解反应中,氢氧化钠溶液最佳质量分数为.%,反应适宜温度为7℃.
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