GRE：核心词组之draw,upon:drawupon什么意思

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draw upon 利用
　　释义
　　If you draw upon a resource, you utilize it in some beneficial way.
　　例句
　　People carrying more weight could have more energy and nutritional stores to draw upon.
　　GRE
　　Gutman recreates the family and extended kinship structure mainly through an ingenious use of what any historian should draw upon, quantifiable data, derived in this case mostly from plantation birth registers.
　　Gutman别具匠心的采用了一种任何历史学家都应该去利用的方法重现了家族和亲戚关系的结构，这种方法即可量化的数据，在这个研究中，这些数据主要通过种植园的出生登记信息获得。