| 1. | Allene is an isomer of methyl acetylene .
丙二烯是甲基乙炔的一种异构体。 |
| 2. | Olefin gas closely approximates air .
烯空气跟空气十分近似。 |
| 3. | The acid enolises nearly as well as the ester .
此酸的烯醇化几乎象酯一样良好。 |
| 4. | The carbene also reacts with alcohols .
碳烯也可与醇反应。 |
| 5. | Enolase isolated from peas was sensitive to fluoride .
从豌豆提取的烯醇酶对氟化物敏感。 |
| 6. | The polydiene basic molecular structure is an excellent fuel .
聚二烯基本分子结构是一良好的燃烧剂。 |
| 7. | We have already met one series of specific enol equivalents .
我们已经遇到过一系列有特效的烯醇等当物。 |
| 8. | Thermolysis of the latter furnished the cyclohexadienone system .
后者经过热解，就转变成环己二烯酮的衍生物。 |
| 9. | In there compounds, the cyclopentadiene ring has only four hydrogens .
在这些化合物里，环戊二烯环只有4个氢。 |
| 10. | All the chief difficulties crop up in the synthesis of the enone(1) .
所有的主要难点都涌现在烯酮（1）的合成中。 |
