障碍因子
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obstacle factor set 障碍因素集
Main obstacle factor 主要障碍因子
obstacle influence factor 障碍物影响系数
·2,447,543篇论文数据，部分数据来源于NoteExpress
To this internal scenario, the result of the American elections could be a catalyst or obstacle for changes, but it is no longer the most important factor to consider.
CNN: Should the U.S. raise a fist or offer a hand to Cuba?
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