难句类型:复杂修饰、插入语
解释:本句的主句中有一个长插入语however,on the basis of observations concerning mantle xenoliths,割裂了主谓,但句子的主要难度还是在that引导的宾语从句中,从句中有由but 所连接的两个句子,一起延续到句末。首选是rich in incompatible elements修饰fluids;后面又有一个同位语和一个分词结构,都是修饰incompatible elements的,最后还有一个状语来修饰那个分词结构,层层修饰,比较复杂。
意群训练:Some geologists,however,on the basis of observations concerning mantle xenoliths, argue that the mantle is not layered,but that heterogeneity is created by fluids rich in incompatible elements percolating upward and transforming portions of the upper mantle irregularly,according to the vagaries of the fluids pathways.
以上内容即是GRE阅读长难句解析,新gre阅读要求考生具有更强逻辑推理能力。虽然逻辑推理能力的考察对我们国内考生来说有点难度,只要保持好心态就能更好地去理解长难句在gre阅读考试句子类型。
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