As oil is often found in the ground its presence cannot be deter

As oil is often found in the ground its presence cannot be determined by a study of the surface.Consequently,a geological survey of the underground rock structure must be carried out.
【正确答案】：由于石油深埋地下，靠研究地面，不能确定有没有石油。【解析】原句是被动句，汉译时评作主动，村合汉语多用主动表达事物的客观性，而英语则相反。原句中presence是名词，汉译时转化为动词“有没有”。