1. syngas for synthetic ammonia 
   合成氨原料气
2. impregnation with ammonia or a compound of ammonia. 
   用氨水或氨的化合物浸渍物质。
3. history of synthetic ammonia industry 
   合成氨工业发展史
4. 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。
5. A compound that contains ammonia. 
   氨化物含有氨的化合物

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• 1. 乙醛合氨
  acetaldehyde 乙醛...acetaldehyde ammonia 乙醛合氨...acetaldehyde reductase 醇脱氢酶
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• 2. 醛氨
  acetaldehyde 乙醛; 醋醛...acetaldehyde ammonia 醛氨...acetaldehyde dehydrogenase 乙醛脱氢酶
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