有人提出，在给定的产量水平上，能否得出这样的结论：达美航空现在的业务消耗的化石燃料比以前要少。
The question has been raised whether it can be concluded that for a given level of output, Delta's operation now causes less fossil fuel to be consumed than it did formerly.
然而，一些矿物燃料比煤的污染要小。
首先，再循环使用的燃料比原来的铀更贵。
First, the recycled fuel is more expensive than the original uranium.
它从糖生产燃料比其他微生物多5到10倍。
They also produce five to 10 times more fuel from the same amount of sugar.
合适的高炉炉型是提高产量、降低燃料比的关键。
The inner profile is one of key factors which influence the productivity and fuel rate of BF.
通过优化高炉操作参数，燃料比和工序能耗不断降低。
By optimizing BF operation, fuel ratio and operational energy consumption were constantly lowered.
用纤维素生产生物燃料比将玉米和甘蔗产乙醇有诸多好处。
Cellulose biofuels have advantages over ethanol from corn and sugar cane.
提高热风温度是高炉增加喷煤量和降低燃料比的重要措施。
Increasing the temperature of hot blast is an important measure for higher coal rate and lower fuel rate of blast furnace.
寒冷的空气中摄入可以帮助你提高你的燃料经济的空气燃料比。
Cold air intakes can help your fuel economy by improving your air to fuel ratio.
另一种燃料车是一辆汽车，运行于其他燃料比传统汽油或柴油汽油。
An alternative fuel vehicle is a vehicle that runs on fuel other than traditional gasoline or diesel petrol.
当空气-燃料比变化时，燃烧干煤与燃烧高水分煤有着类似的试验结果。
For the combustion of dry coal, the results with varying air fuel ratio are similar to those for the combustion of high moisture coal.
通过比较得出，代用燃料比传统燃料更为清洁，但在其他方面还有待进一步改善。
Through comparison, the result shows the replacement fuels appears cleaner, but the other properties should be improved further.
航空公司希望从这次由伦敦飞往阿姆斯特丹的试飞当中证明生物燃料比普通的飞机燃料排放的二氧化碳要少得多。
In a test flight from London to Amsterdam, the airline hopes to show it can produce less carbon dioxide than normal jet fuels.
所有这些替代品都是碳基燃料，其分子比汽油分子更小、更简单。
All of these alternatives are carbon-based fuels whose molecules are smaller and simpler than those of gasoline.
所有这些替代品都是碳基燃料，其分子比汽油分子更小、更简单。
All of these alternatives are carbon-based fuels whose molecules are smaller and simpler than those of gasoline.
在某种程度上，这意味着它们的成本比化石燃料要低——当然是当你给汽车加油的时候。
In a way that means they have to cost less than fossil fuels—certainly when you're filling up your car.
对投资者来说，像这样的绿色建筑不一定具有成本效益，但它产生的污染确实比通过化石燃料产生能源的过程少得多。
Green buildings like this aren't necessarily cost-efficient for the investor, but it does produce much less pollution than that caused by energy production through fossil fuels.
然而，由于以甲醇为燃料的车辆在设计上可以比以甲醇为燃料的“汽油克隆”车辆效率高得多，因此它们所需的燃料相对较少。
However, since methanol-fueled vehicles could be designed to be much more efficient than "gasoline clone" vehicles fueled with methanol, they would need comparatively less fuel.
那时候的汽油价格比其他燃料更加昂贵。
At that time petrol was expensive compared with other fuels.
但是，在太空这些火箭的效率很低——它们通过燃烧大量的燃料，产生了比需要更多的推力。
In space, however, these rockets are inefficient-they burn through huge quantities of fuel while generating more thrust than necessary.
这应当能够让生物反应器源源不断地生产燃料——比从池塘中收获藻类，然后提炼油的传统工艺更有效率。
This should permit continuous production of fuels in a bioreactor -more efficient than the traditional process of harvesting algae from a pond and then extracting the oil.
这应当能够让生物反应器源源不断地生产燃料——比从池塘中收获藻类，然后提炼油的传统工艺更有效率。
This should permit continuous production of fuels in a bioreactor - more efficient than the traditional process of harvesting algae from a pond and then extracting the oil.
文特尔博士认为，即使使用现有技术，每公顷藻类所能生产出来的燃料也应有可能比玉米多十倍。
Dr Venter reckons that even with existing technology, it should be possible to turn out ten times more fuel per hectare than can be garnered from maize.
还有另一个扫兴的事：最近在麻省理工学院的研究表明，化石燃料实际上可能比新的生物燃料更环保。
And there's another buzzkill: A study at MIT recently showed that fossil fuels might actually be greener than the new biofuels.
还有另一个扫兴的事：最近在麻省理工学院的研究表明，化石燃料实际上可能比新的生物燃料更环保。
And there's another buzzkill: A study at MIT recently showed that fossil fuels might actually be greener than the new biofuels.
应用推荐