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31. | Carbon monoxide (CO) is a colorless, odorless, poisonous gas, slightly lighter than air, that is produced |
| 一氧化碳(CO)是一种无色无味的有毒气体,比空气稍轻,这是由燃料中的炭不能完全燃烧生成的,主要来源是内燃机,大多产生于机动车辆。 |
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32. | Pure acetylene is a colorless, highly flammable gas with an agreeable ethereal (ether-like) odor, but |
| 纯乙炔是无色、极易燃气体,带有令人愉快的醚(象醚一样)的气味,但商用纯级的乙炔的气味明显象大蒜。 |
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33. | A colorless, spontaneously flammable poisonous gas, PH3, having a fishy odor and used as a doping agent |
| 磷化氢,三氢化磷一种无色的、易自燃的有毒气体,PH3,有象鱼的气味,可用作固体成分的麻醉剂 |
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34. | A colorless, flammable, very poisonous gas, H3As, having an odor like garlic and used in chemical warfare |
| 砷化三氢一种无色可燃,毒性大的气体,H3As,有种类似大蒜的气味,用在化学武器中,用作固体添加剂,和用于有机合成 |
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