他们也倾向于生产劣质煤，这些煤在燃烧时产生相对高的污染水平。
They also tend to produce poor-quality coal which generates relatively high levels of pollution when burned.
但是在未来数年，不管我们喜不喜欢，大多数电力还是来自于传统以煤为燃料的火电厂，由此产生的温室气体排放的增加在世界范围内是最快的。
But in the coming years, like it or not, most electric vehicles would rely on conventional coal-fired power, which is responsible for the fastest growth in greenhouse-gas emissions worldwide.
克拉克森是世界首屈一指的船商，他于二十世纪九十年代初率先开发了衍生品——干散货(例如铁、煤)，并且在今年一月进行了首次集装箱衍生品的交易。
Clarksons, the world's biggest shipbroker, which pioneered derivatives for dry-bulk cargoes like iron ore and coal in the early 1990s, made its first container-derivative trade in January this year.
锗主要赋存于硅酸盐矿床、硫化物矿床和煤中，在部分斑岩和碳酸盐中也发现有锗的存在，且具有工业开发的价值。
Germanium can be concentrated in silicate ore deposit, sulfide ore deposit and coal, and partly in porphyry and carbonate, therefore it has good industrial development future.
煤层的构造组合型式在很大程度上取决于构造应力作用、含煤地层的岩石力学性质和应变环境等。
Tectonic group patterns of coal seam depended on tectonic stress field, mechanical properties of rock of coal-bearing formation and surrounding environments.
在纵向上，煤聚积于石炭—二叠系和侏罗系，石油和铀矿主要分布在侏罗系，天然气则储集在奥陶系和二叠系。
Vertically, coal distributes in Permo-Carboniferous and Jurassic; oil and uranium distributes mainly in Jurassic while gas distributes in Ordovician and Permian.
在诸多生产因素已固定的条件下，焦炭质量主要取决于原料煤性质。
With many production conditions such as equipments, parameters, fixed, the coke quality mainly depends on the quality of coal.
能源是经济发展的重要保障，现代经济是建立在煤、石油、天然气、水电和核能等能源基础之上的。人类社会在一定时期使用什么能源取决于当时能够达到的科学技术水平。
Energy is the important guarantee for economic development, and the modern economy is established on the basis of energy, such as coal, oil, natural gas, water, electricity, and nuclear.
结果表明：外加钠在热解过程中对NH3释放的作用较大程度上取决于煤的变质程度，变质程度越低的煤影响越明显。
The results showed that the influence of Na metal added on NH3 release during pyrolysis greatly depended upon coal metamorphism, which made the obvious influence on the coal with lower metamorphism.
结果表明：外加钠在热解过程中对NH3释放的作用较大程度上取决于煤的变质程度，变质程度越低的煤影响越明显。
The results showed that the influence of Na metal added on NH3 release during pyrolysis greatly depended upon coal metamorphism, which made the obvious influence on the coal with lower metamorphism.
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