primary source
noun /ˈpraɪməri sɔːs/
/ˈpraɪmeri sɔːrs/
- a document, etc. that contains information obtained by research or by observing somebody/something carefully, not taken from other books, etc. compare secondary source
单词 | primary source |
释义 | primary sourcenoun /ˈpraɪməri sɔːs/ /ˈpraɪmeri sɔːrs/
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