Top-20 frequently occurring keywords.

Name: Top-20 frequently occurring keywords.
Published: 2015-04-27T00:00:00+08:00

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数据链接：

https://figshare.com/articles/dataset/_Top_20_frequently_occurring_keywords_/1395215 数据链接链接失效反馈

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资源简介：

Bold keywords have appeared in all four time periods (could be in different numerical order) as well as in the top-20 list of the aggregated time (i.e., 20 years) Top-20 frequently occurring keywords.

创建时间：

2015-04-27

Top-20 frequently occurring keywords.

资源简介：

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