A containment pond holds tar sands tailings, consisting of a mixture of sand, water, and toxic chemicals that remain after the unrefinedoil products have been extracted.
图为污水池里的油砂残渣，其中混有沙子、污水以及萃取未精炼的石油产品后所残留的有毒化学物质。
2
Africa is mostly exporting oil and other unrefined natural resources, in return for cheap manufactured goods like perfume, clothes and computers.
非洲主要靠出口石油和其他未经提炼的自然资源换取诸如香水、服装和电脑等价格低廉的工业制成品。
3
When heated to a moderate frying temperature of 350 degrees, only the unrefined sesame oil had a distinctive flavor.