| 1. | Allene is an isomer of methyl acetylene .
丙二烯是甲基乙炔的一种异构体。 |
| 2. | Labelled shikimic acid is reality converted to phenylalanine .
标记的莽草酸迅速地转变成苯丙氨酸。 |
| 3. | in allene, the frequency falls further to 1389 .
在丙二稀类中，该频率再度降至1389厘。 |
| 4. | Alanine appears to be the preferred amino acid in the transamination .
丙氨酸在转氨作用中似乎是更好的氨基酸。 |
| 5. | The acute toxicity of isoproterenol is much less than that of epinephrine .
异丙肾上腺素的急性毒性比肾上腺素小得多。 |
| 6. | This allyl type of resin is a highly transparent, colourless material .
这种烯丙基型的树脂是一种高度透明的、无色材料。 |
| 7. | These peaks correspond to side-chain cleavage of the ethyl and propyl groups respectively .
这些峰分别相当于乙基和丙基的侧链开裂。 |
| 8. | This sequence constitutes an efficient method for preparing arylcyclopropylacetylenes .
这种反应构成了制备芳基环丙基乙炔的有效方法。 |
| 9. | Duplication of bands in this region is also shown by trifluoropropyne and perfluoro2-butene .
三氟丙炔和全氟丁烯-2在这个区域也出现双重谱带。 |
| 10. | Of these end groups those having an allylic chlorine might be expected to show the highest activity .
在这些端基中，带有烯丙基氯原子的端基活性最高。 |
