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。
Heavy oil is the important resource of 21st century.
稠油将是21世纪的重要资源。
Heavy oil is the important resource of 21st century.
稠油将是21世纪的重要资源。
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