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| 21. | A combustible gas, chiefly methane, occurring naturally in mines from the decomposition of coal. |
| 沼气一种在矿坑里由煤腐烂而自然产生的可燃气体，主要成分是甲烷 |
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| 22. | Others, such as nitrous-oxide emissions fromsoils and methane emissions from animals, cannot. |
| 而另外一些却不能直接检测，比如从土壤中排放的一氧化二氮与从牲口身上排放的沼气。 |
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| 23. | Depending on the waste feedstock and the system design, biogas is typically 55% to 75% pure methane. |
| 视垃圾原料和系统设计而定，沼气通常含有55%至75%的纯沼气。 |
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| 24. | We're not explorlng alternative fuels like methane - it's hard to hold that chicken overthe gas tank. |
| 我们并未研究像沼气这样的替代燃料 在加气时都很难对准油箱 |
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| 25. | You obviously don't know anything about methane deposits. |
| 你不是也不知道这有沼气聚集吗. |
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| 26. | Now scientists from Europe and the Philippines have discovered that less methane is made in fields where |
| 现在，来至欧洲和菲律宾的科学家发现在生产更多稻谷的稻田中，产生较少的沼气。因为产生沼气需要炭。 |
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| 27. | Toxicant eupatorium adenophorum spreng can be used as a feedstuff after methane fermented. |
| 毒性紫茎泽兰经预处理并沼气发酵后，能制成饲料。 |
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| 28. | Tap water, heating, air conditioning, hot water, coal gas, liquefied petroleum gas, natural gas, methane |
| 自来水、暖气、冷气、热水、煤气、石油液化气、天然气、沼气、居民用煤炭制品； |
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| 29. | State-of-the-art systems report producing biogas that is more than 95% pure methane. |
| 最新系统报告产生的沼气中甲烷的含量超过95%。 |
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| 30. | biogas manure |
| 沼气肥 |
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