意群训练:But the recent discovery of detailed similarities in the skeletal structure of the flippers in all three groups undermines the attempt to explain away superficial resemblance as due to convergent evolution the independent development of similarities between unrelated groups in response to similar environmental pressures.
gre阅读长难句的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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