The amount of carbon dioxide released by human activities such as burning coal and oil is small in comparison 相比之下,人类活动燃烧煤、石油等所释放的二氧化碳要少一些。
The fossil fuels ( coal and oil) are finite resources. 化石燃料(如煤和石油)属于有限资源。
Fossil fuels such as coal, oil and gas will service our needs for some considerable time to come. 诸如煤、石油和天然气之类的矿物燃料会在以后很长一段时间里满足我们的需求。
First, we should use more clean energy and less coal and oil. 首先,我们应更多地使用清洁能源,减少煤和石油使用。
The gas and petrol are examples of secondary fuels by which coal and oil may be more effectively used. 焦炭,煤气和汽油是更加有效地利用煤和石油的第二级燃料的范例。
We should exploit these energies, such as coal, oil and natural gas. 我们应该开发利用这些能源,如煤、和天然气等。
The results show that the3D fluorescence spectra of coal oil in aqueous solution mainly have one broad peak. 研究结果显示,煤油溶液的三维荧光光谱主要为一个宽峰。
It is certain that fuels like coal and oil cause a lot of pollution. 煤和石油这类燃料能造成大量的污染,这是肯定的。
Coal, oil, wood and gas are fuels. 煤炭,石油,木柴和煤气都是燃料。
More and more new types of energy resources have been exploited to replace coal and oil. 越来越多的新型能源被开发出来代替煤和石油。
At northern mid-summer, methane is released at a rate comparable to that of the massive hydrocarbon seep at Coal Oil Point in Santa Barbara, Calif. 在北方的夏天中间时候,甲烷的释放速度可以同加州圣巴巴拉煤油点大量碳氢化合物的渗出相比。
This method was used in experiments on a burner of mixed coal and oil. 在油煤混烧的燃烧器上运用该方法进行了实验研究。
Wood, coal, oil and gas are different knids of fuel. 木材,煤,油和天然气是不同种类的燃料。
Three-dimensional ( 3D) excitation-emission matrix ( EEM) fluorescence spectroscopy is applied to characterize the coal oil. 本文利用三维激发-发射矩阵荧光光谱研究了煤油的荧光特性。
Chemical changes have made a great many plants into coal, oil, and gas. 化学变化使得大量植物变成煤、石油和煤气。
It is generated by burning fossil fuels: petrol, coal, oil etc. 通过燃烧汽油,煤和石油等化石燃料而产生。
Example Our country has a great deal of coal, oil and natural gas. 我们国家有大量的煤,石油和天然气。
Study on rheological properties of optimizing coal oil mixture at normal temperature and atmosphere 优化后的油煤浆常温常压流变特性的研究
Coal, oil and minerals are the raw materials of industry. 煤、石油和矿产品都是工业原料。
The three main sources of power are coal, oil and water power. 动力的三个主要来源是煤,石油和水力。
Coal and oil are natural products. 煤和石油是天然物产。
The fitting dosage of the thinner is 10% of the total weight of the organic extraction solvent ( Tri-Butyl-Phosphate and coal oil). 稀释剂的适宜加入量为有机溶剂总量(TBP和煤油)的10%;
Effective way of increase function of coal oil water slurry 提高煤-油-水三元煤浆性能的有效方法
The causes of fatigue fracture in the plunger spring of coal oil slurry pump are analyzed, and a mathematics model of anti-fatigue strength for the plunger spring is established. 分析了喷油煤浆泵柱塞弹簧的疲劳断裂原因,建立了其抗疲劳强度的数学模型,并根据喷油煤浆泵柱塞的工作特点和材料性能,提出了一种新的柱塞弹簧的可靠性设计方法。
The test results indicated that the use of coal oil mixture in diesel engines is possible and seems satisfactory. 试验结果证明在该机上燃用煤油浆是可行的,其工作情况良好。
In order to select a proper organic solvent as consecutive phase in inverse emulsion polymerization, we have done a serious of contrastive experiment, and found cyclohexane as consecutive phase is more suitable than white oil, coal oil and solvent oil. 在油相选择方面,本文通过一系列对比实验,从白油、环己烷、煤油和溶剂油之中选择环己烷作为反相乳液聚合的有机相。
The article briefly introduced the present situation of process technology, commercial operation of liquefied coal oil at home and abroad. Some suggestions on developing liquefied coal oil in China are put forward. 介绍了国内外煤炭液化制油的工艺技术及商业化运作情况,并对我国发展煤液化油提出一些建议。
Study on the Fatigue Fracture Resistance of the Plunger Spring for Coal Oil Slurry Injection Pump 喷油煤浆泵柱塞弹簧抗疲劳断裂研究
This paper briefly summarized the main properties of humic acid, and the influence of humic acid on the pro-cesses of extracting and back extraction uranium by using mixture of tertiary amine and coal oil. 简要叙述了腐植酸的主要性能,论述了腐植酸对叔胺-煤油溶液萃取铀和反萃取铀过程的影响。