To qualify under the RFS, ethanol and other fuels would have to reduce life-cycle greenhouse gas emissions by 20 percent compared with gasoline.
根据可再生燃料标准，乙醇及其它可再生燃料的生命周期温室气体排放量必须比汽油低20%。
The climate accord orders Europe to cut greenhouse gas emissions by 20% by 2020 compared with 1990 levels.
环境协议要求欧洲各国温室气体的排量到2020年与1990年相比同比减少20%。
According to the EPA, ethanol produced from corn at a modern refinery powered by biogas can represent a 20 percent greenhouse gas reduction compared with regular gasoline.
据美国环保署说，与普通汽油相比，在一个靠沼气发电的现代炼油厂使用玉米提取的乙醇能使温室气体排放降低20%。
Compared with carbon dioxide, nitrous oxide is 300-fold more potent in terms of its warming potential, though carbon dioxide is a far more prevalent greenhouse gas.
虽然二氧化碳是更为普遍的温室气体，但与二氧化碳相比，一氧化二氮是其致暖潜力的300倍以上。
Coal is relatively cheap compared with oil and natural gas, although coal prices have tripled in the past few years.
其次，与石油和天然气相比，煤炭价格也比较便宜，尽管煤价在过去的几年里增长了两倍。
The United States pledged to reduce greenhouse gas emissions by about 17 percent by 2020 compared with 2005, contingent on Congress’s enacting climate change and energy legislation.
美国保证将在2020年时将本国的温室气体排放量与2005年行笔降低17个百分点， 与国会将制定气候变化与能源法令相一致。
Compared with the technological investments needed to reduce greenhouse gas emissions globally, the cost of meeting the current demand for family planning is cheap.
与那些为了在全球范围内减少温室气体排放而花费在技术研发上的费用相比，维持现有的生育计划更为省钱。
Wind costs more than $2.5 billion per gigawatt to build, compared with $600 million for gas.
风能发电25亿美元每千兆瓦的建造成本，对比汽油只需要6亿。
General Motors (GM) announced a 30% fall in car sales in May, compared with a year earlier, as high fuel prices prompted Americans to shun its gas-guzzlers for smaller, more frugal vehicles.
通用汽车宣布5月汽车销售量与上年同期相比下降30%，原因在于高油价促使美国人放弃购买耗油量大的车型，转而购买体型较小且更经济的车型。
Next is the cost of as much as $10 billion and five years to build each reactor, compared with about $1 billion for a natural gas-fired power plant.
即使突破了前面的重重难关，开发商还要花费将近百亿美金和五年的时间建造每一个反应堆。相较之下，一个燃气发电厂的造价不过十亿而已。
Compared with Air Insulated Substation (AIS), Gas Insulated Substation (GIS) has many merits, so it has been applied widely in the world.
气体绝缘变电站(GIS)由于其与空气绝缘变电站相比(AIS)有诸多优点，在世界各地的应用越来越广泛。
Compared with general separation methods, the technology of membrane separation possesses has many advantages in gas separation and has been used in industries widely.
与常规分离方法相比，膜分离技术在气体分离中的应用具有许多优势，在工业上得到了广泛的应用。
In this paper, the stratigraohic volume density and hydrogen index gained from the information of density-neutron logging are respectively compared with both the low-limit values of gas formation.
本文从密度和中子测井信息中提取的地层体积密度及含氢指数，分别同气层体积密度及含氢指数的下限值作比较，前者小于后者，直观指示为气层。
Compared with combustion of oil and gas, combustion of briquette has good economic results.
与燃油、燃气相比，型煤燃烧具有良好的经济性。
Compared with hot cyclone-type CFB designs, the IR-CFB has significantly lower furnace exit gas velocity and requires significantly less building volume.
与热旋风型CFB设计相比，IR - CFB的炉膛出口烟气速度极大地降低，同时所要求的建造体积也极大的减小了。
He compared CBM with natural gas, saying, If you can find the gas, you can probably get it out.
与他相比，天然气煤层气，说：如果你能找到气你可以找到它。
Compared with normal hammers, it has a lot of advantages, such as lower noise, no exhaust gas, less vibration, high piling energy and better dynamics characteristics.
与传统打桩锤相比较具有噪声小、无污染、振动小、打击能量高等优点，符合环保要求，并具有良好的动力学特性。
Compared with the normally trapped gas, the accumulation of typical deep basin gas is dominantly controlled by the capillary pressure and burying depth of tight sands.
与受浮力作用影响(与气柱高度有关)的典型常规气藏相比，典型深盆气成藏与埋藏深度有关。
Based on the climate and energy costs in Shanghai, energy consumption and running costs of the gas engine heat pump was analyzed and compared with electric heat pump.
以上海地区的气候条件和能源价格为基础，对燃气机热泵供暖的能耗和运行费用进行了分析比较。
At present many home laboratories use gas chromatography methods to measure co, this passage compared gas chromatography methods with gas filter correlation technique.
目前国内很多实验室采用气相色谱法对CO组分进行定值，本文就气相色谱法和气体滤光相关技术对CO的定值结果进行了比对。
Modification effect of hot filament gas discharge PIII was compared with that of radio-frequency (RF) glow discharge PIII.
分析比较了灯丝放电PIII和射频辉光放电PIII对基体表面进行氮离子注入后的改性效果。
As compared with traditional separation methods, the technology of membrane separation possesses many advantages in gas separation and has been used widely in industries.
与传统分离方法相比，膜分离技术在气体分离中的应用具有许多优势，在工业上得到了广泛的应用。
The heating furnace direct fuel compared with hot gas, can save energy economy after above 60%.
相比直接燃油的热加工炉，使用热煤气后可节省能源经济60%以上。
Compared with traditional methods for natural gas dehydration, membrane separation process possesses advantages and competitiveness in working performance and economic benefit.
与传统的天然气脱水方法相比，膜分离法天然气脱水在工作性能、经济效益等方面具有优势和竞争力。
The current natural gas liquefaction technology is compared with thermoacoustic refrigeration technology.
将当前的天然气液化技术与热声制冷技术进行比较。
The new calculation results are compared with those based on the recommended formulae in the oil-and-gas pipeline design specifications.
将新公式的计算结果与有关油气管道设计规范推荐公式的计算结果进行了比较。
Gas volume fraction distribution and flow pattern in the two reactors are compared with the experimental and computational results in the literature.
比较了两种反应器内的气含率分布和流型，并将计算结果与文献中的实验数据和计算结果对比。
The dynamic behaviors of intercooled regenerated cycle gas turbines are analyzed by an example, and are compared with simulation results of simple cycle gas turbines.
通过实例，对中冷回热循环燃气轮机的动态性能进行分析，并与简单循环燃气轮机仿真结果进行比较。
The dynamic behaviors of intercooled regenerated cycle gas turbines are analyzed by an example, and are compared with simulation results of simple cycle gas turbines.
通过实例，对中冷回热循环燃气轮机的动态性能进行分析，并与简单循环燃气轮机仿真结果进行比较。
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