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Bottlenecks and the proliferation of crudes , with different physical qualities , cause headaches .

各种各样的瓶颈与质量参差不齐的原油种类的激增，带来了许多令人头痛的问题。

The canadian government has been lobbying hard against international restrictions on its tar sands fuels , which result in much greater carbon emissions than conventional crudes .

加拿大政府一直在游说国际社会放宽对它来自油砂的燃料油砂比原油导致的碳排放更多的限制。

Under china 's oil product pricing system , domestic fuel prices may be adjusted when the moving average of a basket of international crudes changes more than 4 % over a period of 22 working days .

按照中国的成品油定价体系，如果在22个工作日内，一篮子国际原油的移动平均价格变动超过4%，国内燃油价格可能会跟着调整。

' Brent crude has demonstrated remarkable strength since the beginning of february as asia becomes the marginal buyer of north sea and african crudes , ' mr. eagles said .

伊格尔斯说，随着亚洲成为北海布伦特原油和非洲原油的边际买家，布伦特原油2月初以来便表现出了相当的坚挺。

A leading benchmark crude oil produced in the united arab emirates , used in pricing sour crudes , predominantly for pricing middle east crude exports to asia .

迪拜原油阿联酋出产的一种原油，是含硫原油的主要定价基准，尤其是用于为中东出口至亚洲的原油定价。