相关wascreatedremainsone的文学知识

问题详情：HowtheGrandCanyon(大峡谷)wascreatedremainsoneofthegeology’sgreatestmysteries.SomeevidencesuggeststhattheprocesswasagradualoneinwhichtheColoradoRiver(whichrunsthroughthecanyon)slowlycutdeepera...