| 1. | Every carbon atom has four bonds .
每个碳原子的价键为四。 |
| 2. | We have made no reference to asymmetric carbon atoms .
我们未曾涉及不对称碳原子。 |
| 3. | Carbon atoms provide the backbone of living matter .
碳原子提供了生活物质的主链。 |
| 4. | Carbon atoms provide the backbone of living matter .
碳原子提供了生命物质的骨架。 |
| 5. | At the end of the series of reactions each carbon atom is recovered .
在反应的最后每个碳原子都可以回收。 |
| 6. | Hydrocarbons are molecules containing only hydrogen and carbon atoms .
碳氢化合物是只含碳原子和氢原子的分子。 |
| 7. | In the ethyne molecule, a double bond links together the two carbon atoms .
在乙烯分子中是由一个双键将两个碳原子连结在一起的。 |
| 8. | All steroids contain a skeleton of 17 carbon atoms organized into four rings .
所有的类固醇都含有排列成四个环的17个碳原子的骨架。 |
| 9. | Each of the four valency electrons of the carbon atom is shared with one of a hydrogen atom .
碳原子的四个价电子都各与氢原子的一个价电子共用。 |
| 10. | The meso carbon atom of the methine linkage of the dye is attached to the nitrogen atom of an amino group .
该染料的甲川链上的中位碳原子与氨基的氮原子相连。 |
