In a trench dug by a University of South Florida Coastal Research Lab team, layers of oil-stained sand light up orange under ultraviolet light. Clean sand appears violet.
南佛罗里达大学海岸研究实验室的团队挖掘的一条地沟，沾了油污的沙子在紫外线下为橙色，而干净的沙子为紫色。
He speculated that the oil may glow orange because of iron content, but the answer will have to wait until after the oil is analyzed in a lab.
他推测是因为石油里含有铁才呈现橙色，但要等到实验室对石油进行分析之后才能知道结果。
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