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| 21. | A colorless, volatile liquid, C2H5NH2, used in petroleum refining and detergents and in organic synthesis |
| 乙胺一种无挥发性液态碱C2H5NH2，用于石油精炼、清洁剂和有机合成 |
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| 22. | a colorless flammable liquid alkane derived from petroleum and used as a solvent. |
| 一种无色、易燃烧的液体，从石油中提取，用作溶剂。 |
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| 23. | a colorless pungent liquid widely used in manufacturing plastics and pharmaceuticals. |
| 一种无色、刺激的液体，广泛用于制造塑料和药物。 |
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| 24. | A colorless organic liquid, C9H8, obtained from coal tar and used in preparing synthetic resins. |
| 茚一种无色的有机液体，C9H8，从煤油中取得并用于配制人工合成树脂 |
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| 25. | a colorless explosive liquid that is volatile and poisonous and foul-smelling. |
| 一种无色的液体炸药，具有挥发性、毒性及腐味。 |
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| 26. | a clear colorless volatile liquid (alcohol) used as a solvent and antiseptic. |
| 一种无色清亮易挥发的液体（酒精），用作溶剂和防腐剂。 |
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| 27. | Chloral is a colorless, volatile liquid with a very penetrating odor and boiling at 97.7℃. |
| 三氯乙醛是无色挥发性的液体，带有刺激性很强的气味，在97.7℃沸腾。 |
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| 28. | a clear colorless odorless tasteless liquid. |
| 一种清亮无色无嗅无味的液体。 |
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| 29. | chloral is a colorless, volatile liquid with a very penetrating odor and boiling at 97.7 |
| 三氯乙醛是无色挥发性的液体，带有刺激性很强的气味，在97.7℃沸腾。 |
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| 30. | A colorless, volatile liquid, C9H13N, used primarily as a central nervous system stimulant. |
| 苯异丙胺，安非他命一种无色挥发性液体，C9H13N，主要用作中枢神经系统兴奋剂 |
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