以下为句子列表：
英文: Abstract: The traditional catalyst used in acetal(ketal) synthetic reaction is strong inorganic acid.But there is some limits to its use because of its side reaction,strong erosion and liability to pollute the environment.Molybdophosphoric acid is used as
中文: 文摘:缩醛(酮)合成反应的传统催化剂为无机强酸，但由于副反应多、腐蚀性强和易污染环境等缺点，其使用受到限制.用磷钼酸为催化剂，通过醛(酮)与乙二醇直接反应得到了三种缩合产物.对影响反应的诸因素进行研究,结果表明，用磷钼酸作催化剂，用量小，活性高，产品收率较高，且重复使用性能较好.
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英文: Alcohol dehydrogenase An enzyme that converts ethanol into acetaldehyde (ethanal).
中文: 醇脱氢酶：把乙醇转化为乙醛的酶。
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英文: During alcoholic fermentation acetaldehyde acts as a hydrogen acceptor instead of oxygen.
中文: 在这个过程中乙醛取代了氧作为氢的受体。
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英文: One of these, called alcohol dehydrogenase, turns the alcohol molecules into another chemical, acetaldehyde.
中文: 其中有一种叫酒精脱氢酶，把酒精分子转化成另一种化学物质，乙醛。
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英文: The acetaldehyde is further reduced by NADH to form ethanol, releasing only about a tenth of the energy that would be released by aerobic respiration.
中文: 乙醛进而结合NADH形成乙醇释放，仅为有氧呼吸十分之一的能量。
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