丁醇本来是从糖发酵生产的，每加仑丁醇燃烧比乙醇释放更多能量，它还可以通过现有的输油管运输。
Butanol, which is typically made by fermenting sugar, packs more energy per gallon than ethanol and can be shipped via existing oil pipelines.
根据一些报道，丹麦人每年燃烧的蜡烛比其他欧洲国家的人多。
According to some reports, Danish people bum more candles every year than people from any other European country.
因此，他们空腹行走比进食后行走燃烧的脂肪更多。
As a result, they burned more fat during walks on an empty stomach than when they had eaten first.
根据大多数计算结果，竞走者以每小时6英里的速度前进时，每小时会燃烧大约800卡路里，尽管比跑步时燃烧的热量要少，但这大约是他们走路时燃烧热量的两倍，跑步时每小时可能会燃烧大约1000卡路里或更多。
According to most calculations, race walkers moving at a pace of six miles per hour would burn about 800 calories per hour, which is approximately twice as many as they would burn walking, although fewer than running, which would probably burn about 1,000 or more calories per hour.
二手烟雾指人们燃烧卷烟、比迪烟和水烟等烟草制品时产生，并弥漫在餐馆、办公室或其他封闭空间内的烟雾。
Second-hand smoke is the smoke that fills restaurants, offices or other enclosed spaces when people burn tobacco products such as cigarettes, bidis and water pipes.
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.
这些碳不能作为燃料，因为要提取出他们来所需要的能量比燃烧他们能获得的能量还要大。
It is useless as fuel, because it would take more energy to extract than would be gained by burning it.
燃烧能量快的的动物比那些把食物缓慢转换成能量的动物生存的时间更短。
Creatures that burn up energy more quickly tend to have shorter lives than animals that convert food into energy slowly.
这是相当长一段时间内，太阳能面板制造商的目标，因为随着太阳能发电价格的下降，甚至比燃烧化石燃料发电的价格更便宜。
That's been the goal of solar panel makers for a long time, because as those prices decline electricity from the sun costs the same as, or is even cheaper than electricity from burning fossil fuels.
走一公里燃烧的热量比跑一公里还要多。
Walking a mile burns even more calories than running a mile.
研究表明回收塑料比燃烧塑料更能节省能量。
Research shows that more energy is saved by recycling plastics than is gained by burning them.
燃烧天然气发电依旧比风力涡轮发电更廉价。
Burning natural gas is still a cheaper way of generating power than using wind turbines.
烧煤约产生比燃烧其它如天然气之类的矿物燃料高两倍的二氧化碳。
Burning coal produces roughly twice the CO2 emissions of even another fossil fuel like natural gas.
误区四：跑步比走路更燃烧脂肪。
Myth I hate #4: Running a mile will burn more than walking a mile.
氦气比空气轻得多并且是惰性气体，这意味着，当它与空气和明火接触不会燃烧，而氢气却会(请看下图)。
Helium is far lighter than air and is inert, which means it won't combust when you combine it with air and energy, like Hydrogen does (below).
一些公司同时认为，这种新的电池也能比传统电池更安全——传统电池在短路的时候可能会燃烧。
Some companies also think the new cells could be safer than batteries, which can burst into flame if short-circuited.
与之相反，在煤炭的开采中甲烷释放要少的多；但燃烧煤炭所产生的CO2比燃烧天然气所释放的CO2多出2倍。
Coal, by contrast, is associated with a much smaller methane release during mining; but burning it produces about twice as much CO2 as burning natural gas.
平流层的硫是火山喷发的自然结果，这种硫每吨比燃烧煤释放的硫能造成更强的冷却效应。
Sulphur in the stratosphere, a natural result of volcanic eruptions, provides a lot more cooling per tonne than the coal-emitted sort.
其实比所扬言的要简单得多。科学家们正在开发一种系统利用在污水容易滋生的细菌产生氧化氮，通过火箭推进器燃烧耗尽。
It's actually simpler than it sounds — the scientists are developing a system that exploits sewage-loving bacteria to produce nitrous oxide, which can be used up by a rocket thruster.
尽管迷你高尔夫不会燃烧脂肪，但会消耗比躺在吊床上更多的热量。
Although miniature golf won't incinerate fat, it will burn more calories than lying in a hammock.
这种燃料可以降低火箭的研发与操作成本，储存时也比单纯的液体燃烧更为安全。
These rockets can be cheaper to develop and operate, and the fuel is safer to store than in purely liquid-fuelled ones.
不幸的是，由于缺乏某些调整压缩比的专门方法，这样的引擎如果燃烧汽油的话会立刻四分五裂。
Unfortunately, without some special means for altering the compression ratio, such engines would quickly disintegrate if fuelled with petrol.
千万年以来，人类的主要燃料是木头，燃烧木头的过程中，碳和氢的比率是10比1。相比较而言，煤在燃烧过程中这个比率是2比1，而石油的比率则是1比2。
Humanity's main fuel for eons was wood, which has a carbon-to-hydrogen ratio of 10 to 1 when burned; by comparison, that ratio is 2 to 1 for coal and 1 to 2 for oil.
采用这样的生物燃料被认为是“碳中性”，因为燃烧这些燃料所产生的CO2比在生产过程中吸收的CO2要少。
The use of such biofuel is viewed by many as ‘carbon neutral’ because the carbon dioxide that is emitted from burning the fuel is less than the amount of CO2 the organisms absorb to grow.
采用这样的生物燃料被认为是“碳中性”，因为燃烧这些燃料所产生的CO2比在生产过程中吸收的CO2要少。
The use of such biofuel is viewed by many as' carbon neutral 'because the carbon dioxide that is emitted from burning the fuel is less than the amount of CO2 the organisms absorb to grow.
当火苗在山上以及高速公路两边燃烧时，它似乎有催眠作用。火苗比卡车高多了。
The flames were almost hypnotic as they raged on the mountain and along both sides of the highway, towering above his truck.
实验表明，老鼠在服此药4周后，比正常同类燃烧热量更多、减脂效果更好。
The experiments showed that sedentary mice that took the drug for 4 weeks burned more calories and had less fat than untreated mice.
Leibel博士还提到：“人们减掉难以置信的重量，不是为了获得更大的食量，而是燃烧掉比正常值更多的卡路里，创立完善的体重反弹体系。”
People who lose significant weight not only gain bigger appetite but also burn fewer calories than normal, creating "a perfect storm for weight regain," Leibel said.
环境学家也质疑燃烧树木获取能量的碳效益，表示在一些例子中，“生命周期”排放比煤排放效果更差。
Environmentalists have also questioned the carbon benefits of burning trees for power, saying that in some cases the "lifecycle" emissions are worse than coal.
环境学家也质疑燃烧树木获取能量的碳效益，表示在一些例子中，“生命周期”排放比煤排放效果更差。
Environmentalists have also questioned the carbon benefits of burning trees for power, saying that in some cases the "lifecycle" emissions are worse than coal.
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