| 1. | This intermediate would not be expected to build up to any appreciable concentration .
不应指望这个中间体会以可观的浓度存在。 |
| 2. | Attempts to substantiate the presence of the intermediate have not yet been fruitful .
有人试图证明中间体的存在，但尚未成功。 |
| 3. | The first of the reactive intermediates to be considered is known as a "carbocation" .
要研究的第一种活性中间体叫做“正碳离子。” |
| 4. | The first of the reactive intermediates to be considered is known as a "carboniumion" .
要研究的第一种活性中间体叫做“正碳离子”。 |
| 5. | Many calculations of the properties of reactive intermediates and transition states have been performed .
活性中间体和过渡状态性质的许多计算被实现。 |
| 6. | It provides a useful vehicle for transforming unsaturated acids to their corresponding alkenes .
它为使不饱和酸变成相应的烯烃提供了一个有用的中间体。 |
| 7. | Many calculations of the properties of reactive intermediates and transition states have also been performed .
活性中间体和过渡状态性质的许多计算机也可能被实现。 |
| 8. | Acetic acid is formed as an intermediate in the anaerobic fermentation of carbohydrates, proteins, and fats .
醋酸是碳水化合物，蛋白质和脂肪在厌氧发酵时所形成的中间体。 |
| 9. | The expected adduct 100 was not stable and appeared to undergo further reaction to the spiro intermediate 101 .
由于所期待的加成物（100）不稳定，它经过进一步的反应，就产生螺环中间体。 |
