American refineries require that really light shale to be mixed with heavy crude which is often found with OPEC.

美国炼油厂要求真正轻质的页岩与石油输出国组织经常发现的重质原油混合。

For starters, the U.S. is one of the few countries with refineries that can process Venezuela's heavy crude.

首先，只有极少数国家拥有可以处理委内瑞拉重质原油的精炼厂，而美国是其中之一。

Indian refiners processed heavy crudes that Rosneft once brokered from sanctions-hit Venezuela, a staunch Russian ally in America's backyard.

印度炼油厂加工重质原油，俄罗斯石油公司曾从受制裁的委内瑞拉作为中介，委内瑞拉是美国后院的俄罗斯坚定盟友。

" Approve any single project is unlikely to significantly affect the rate of extraction of the oil and the oil sands, or the refining of heavy crude on the US Gulf Coast."

“批准任何单一项目不太可能对石油和油砂的提取率以及美国墨西哥湾的重油精炼率产生明显影响。”