意群训练:This succession was based primarily on a series of deposits and events not directly related to glacial and interglacial periods,rather than on the more usual modern method of studying biological remains found in interglacial beds themselves interstratified within glacial deposits.
GRE阅读长难句的问题并不是一天两天就能解决的,需要考生的坚持和日常的积累。
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