| 单词 | secondary source |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔primary〕The book is based mainly on primary sources rather than secondary sources.这本书主要基于一手资料而不是二手资料。韦氏高阶〔secondary〕Books written in the present day by historians are secondary sources.历史学家们现在写的书都是第二手资料。麦克米伦高阶〔secondary〕You can't just rely on secondary sources for your research into her life history - you ought to look at primary sources such as her letters and diaries.你研究她的生平不能单靠二手资料，你应该查找原始资料，如她的信件和日记。剑桥高阶〔source〕Historians use a wide range of primary and secondary sources for their research.历史学家在研究中使用大量的原始资料和二手资料。牛津高阶You can't just rely on secondary sources.你不能仅仅依赖间接证据。剑桥国际 |
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