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The experts believe they know the causes of the crime wave but they cannot agree on a cure.专家相信他们都知道犯罪浪潮的成因，但在处理对策上就是无法取得一致意见。Doctors researching into the causes of the disease believe they may have found a cure.研究这种病的成因的医生相信，他们可能已经找到了治疗方法。Rocks can be classified according to their mode of origin.可以根据岩石的成因对其进行分类。Recent research has shed light on the causes of the disease.最近的研究使人们对这种疾病的成因有了更多的了解。We still don't fully understand the causes of the disease. = The causes of the disease are still not fully understood.我们尚未完全了解这种病的成因。No one knows what causes learning disabilities.学习障碍的成因无人知晓。This research might provide an important clue about how cancer develops.这项研究可能会为癌症成因提供重要线索。We need a detailed investigation to determine exactly why these cancers are occurring.我们需要在详细调查后才能准确判断这些癌症的成因。 |