碳

• We have made no reference to asymmetric carbon atoms .
  我们未曾涉及不对称碳原子。
• Carbon atoms provide the backbone of living matter .
  碳原子提供了生活物质的主链。
• Carbon atoms provide the backbone of living matter .
  碳原子提供了生命物质的骨架。
• The carbon is electrophilic centre .
  碳是亲电的中心。
• The noncarbon constituents of the coal would be separated .
  煤的非碳成分将分离出来。
• Another problem is the large carbon loss by entrainment .
  另一问题是大量的碳夹带损失。
• The carbon should be susceptible to attack by a nucleophilic species .
  碳容易被亲核试剂进攻。
• The material in this beach has been dated by radiocarbon .
  这个海滩上的物质经过放射性碳测定。
• Gunpowder is composed of sulfur, carbon, and potassium nitrate .
  火药是由硫、碳和硝酸钾组成。
• Other materials such as carbon-film have been introduced .
  另外有些材料，诸如碳精膜片已被采用。