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Secondary source examples 杂志 书评(或电影评论) 字典和百科全书 教科书 解释或分析他人原创研究的学术期刊文章 Primary和Secondary Sources 之间的转换 有时,主要来源和次要来源可以切换角色,但它们并不是随机切换的(或者只是给您的生活造成更大的压力)。
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