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<table> <thead> <tr> <th>内容</th> <th>地址</th> <th>添加者</th> </tr> </thead> <tbody> <tr> <td>ggplot2文档</td> <td><a href="https://www.rstudio.com/resources/cheatsheets/">https://www.rstudio.com/resources/cheatsheets/</a></td> <td>大仙</td> </tr> <tr> <td></td> <td></td> </tr> </tbody> </table>