Existing distortions in wage differentials will be magnified.工资差别上存在的扭曲现象将被加剧.The top three differentials for this patient include hemangioblastoma, astrocytoma, and metastasis.需要鉴别的三大疾病包括血管母细胞瘤, 星形细胞瘤和转移.During the Seco...
Oil - yielding organic matter is contained in the shales.在这些页岩里有产油的有机物质.Thus clays and shales tend to be impermeable.因此粘土和页岩就往往不透水.Sandstones are, as a rule , interbedded with shales.砂岩通常都与页岩互层.Alternating sandstones and...