1. an oily colorless liquid obtained by the condensation of two molecules of acetaldehyde. 
   一种无色的油质液体，浓缩两个乙醛分子而获得。
2. A colorless liquid polymer, C6H12O3, of acetaldehyde, used as a solvent and a sedative. 
   仲（乙）醛，三聚乙醛一种用作溶剂和镇定剂的无色液体聚合物，c6h12o3

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• 1. 乙醛脱氢酶
  [医]UDP葡糖脱氢酶 acetaldehyde dehydrogenase...乙醛脱氢酶 acetoin dehydrogenase...[医]3-羟基丁酮脱氢酶,羟基丁酮脱氢酶 acyl-coa dehydrogenase
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• 2. 乙醛脫氢酶
  acetaldehyde［=ethanal］乙醛〔食用增香剂〕...acetaldehyde dehydrogenase 乙醛脫氢酶...acetaldehyde mutase 乙醛移位酶；乙醛变味酶
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• 3. 乙醛去氢酶
  聚缩醛；缩醛树脂 acetal resin; polyacetal...乙醛去氢酶 acetaldehyde dehydrogenase...乙醛 acetaldehyde; ethanal
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• 4. 乙醛去氢
  缩醛树脂，聚缩醛 acetal resin，polyacetal...乙醛去氢 acetaldehyde dehydrogenase...乙醛变位 acetaldehyde mutase
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