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| 21. | a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's |
| 无色无味的惰性气体，六种惰性气体之一，构成地球大气约百分之一的部分。 |
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| 22. | Anhydrous hydrogen chloride is a toxic, colorless, liquefied compressed gas that will fume strongly upon |
| 无水氯化氢是有毒、无色的液化压缩气体，暴露在空气中会放出浓烟。 |
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| 23. | a colorless toxic gas with a pungent almond odor; has been used in chemical warfare. |
| 一种无色有毒的气体，有刺激的杏仁味，已经被用于化学战中。 |
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| 24. | "Phosgene (orcarbonyl chloride)：Colorless, highly toxic gas used in chemical warfare as well as in industrial |
| 光气(亦称碳醯氯):无色剧毒气体，用于化学战以及工业生产过程，包括制造染料和聚氨酯树脂。 |
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| 25. | Carbon monoxide( CO) is a colorless, odorless gas produced by incomplete combustion of fuels or other |
| 摘要一氧化碳是一种无色、味的氧体，只要各种燃料或是含碳物不完全燃烧就会生成。 |
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| 26. | a colorless gas (O3) soluble in alkalis and cold water; a strong oxidizing agent; can be produced by |
| 可溶于碱性冷水中的无色气体（O），强氧化剂，可通过在氧气中放电产生，亦可通过紫外线作用于平流层中的氧而获得。 |
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| 27. | A colorless, flammable gas, C2H4, derived from natural gas and petroleum and used as a source of many |
| 乙烯一种无色易燃气体，C2H4，可从天然气和石油中获得，用作许多有机化合物的来源，用于焊接和切割金属，柑桔属水果的着色，以及用作麻醉剂 |
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| 28. | a colorless poisonous gas that smells like new-mown hay; used in chemical warfare. |
| 一种无色的有毒气体，有新鲜干草味，用于化学战。 |
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| 29. | "Phosgene (orcarbonyl chloride):Colorless, highly toxic gas used in chemical warfare as well as in industrial |
| 光气 (亦称碳醯氯):无色剧毒气体,用于化学战以及工业生产过程,包括制造染料和聚氨酯树脂。 |
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| 30. | a poisonous colorless flammable gas used in organic synthesis and to dope transistors and as a poison |
| 一种无色、有毒的可燃气体，用于有机合成，涂抹晶体管，在战争中用作毒气。 |
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