| 1. | also adds the double bond.
同时也加成到双键的两端。 |
| 2. | Compounds containing two double bonds are called dienes .
包含两个双键的化合物叫做二烯烃。 |
| 3. | One atom of oxygen is linked to the nitrogen atom by a double bond .
一个氧原子以双键与氮原子相连。 |
| 4. | With exocylic double bonds the effect of strain is in the opposite direction .
环外的双键的张力效应导致相反的结果。 |
| 5. | 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。 |
| 6. | The triple bond does not usually react so vigorously at a carbon-carbon double bond .
三键在反应时一般不象烯烃中的碳-碳双键那样剧烈。 |
| 7. | Regular vinyl addition polymers may be obtained from particularly strained endocyclic double bonds .
由带特殊张力的桥环双键可以得到规整的乙烯类加成聚合物。 |
| 8. | In cases of doubt the changes following hydrogenation, bromination or other chemical attack upon the double bond can be studied .
在有疑问时可以研究双键的氢化，溴化或其他化学反应所引起的变化。 |
| 9. | Depending upon reaction conditions, the product may be a polyketone formed b y addition polymerization of the ketene double bond .
随着反应条件的不同，产物可以是由烯酮的双键加成聚合得到的聚酮。 |
| 10. | An organic compound containing many double bonds
多烯一种包含许多双键的有机化合物 |
