The heavy oil resource countries represented oil resource development. recently, China has also made some progress in this field.
以委内瑞拉和加拿大为代表的重油资源国，近年来都加大了本国重油资源的开发力度。
The heavy oil is the important resource of 21 century.
稠油将是21世纪的重要资源。
Heavy oil processing is a very important way to make reasonable use of petroleum resource.
重油深度加工是合理利用石油资源的重要途径。
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