1. An organic compound containing a hydroxyl group bonded to a carbon atom, which in turn is doubly bonded to another carbon atom. 
   烯醇一种有机化合物，包含有与碳原子键连的羟基群，该碳原子反过来又与另一个碳原子双键连接
2. a class of fats having long carbon chains with many double bonds unsaturated with hydrogen atoms; used in some margarines; supposedly associated with low blood cholesterol. 
   脂肪的一类，具有带许多氢原子不饱和的双键的长碳链，用于某些人造黄油中，据推测所含血液胆固醇较低。
3. A CFC molecule consisting of chlorine, fluorine, arid carbon atoms can be broken apart by ultraviolet light, which destroys the bond between a chlorine atom and a carbon atom. 
   一个由氯、氟和碳组成的氯氟化碳分子能被紫外线光分解，这破坏了一个氯原子和一个碳原子之间的化学键。
4. carbon and graphite material 
   碳和石墨材料
5. control of carbon oxides 
   碳氧化物控制

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• 1. olefinic bond
  丙基 propyl...碳碳双键 olefinic bond...碳碳三键 triple bond
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