mirror-help/bioc.md

@@ -23,9 +23,13 @@ China (Xi'an),China,Xi'an,http://linux.xidian.edu.cn/mirrors/bioc/,"Xidian Unive
 1. 下载BiocInstaller包，链接地址 https://linux.xidian.edu.cn/mirrors/bioc/packages/3.6/bioc/src/contrib/BiocInstaller_1.28.0.tar.gz （linux版本）
 2. 离线安装BiocInstaller，命令为 `R CMD INSTALL $PACKAGE_PATH/BiocInstaller_1.28.0.tar.gz`
 3.  打开 `BioC_mirrors.csv` 文件，文件路径为`R安装路径/doc/BioC_mirrors.csv` 将下列语句粘贴在文件末尾
-`China (Xi'an),China,Xi'an,http://202.117.120.246/mirrors/bioc/,"Xidian University","Xidian University Open Source Community",1,cn`
+```
+China (Xi'an),China,Xi'an,http://202.117.120.246/mirrors/bioc/,"Xidian University","Xidian University Open Source Community",1,cn
+```
 4. 打开 `CRAN_mirrors.csv` 文件，文件路径为`R安装路径/doc/BioC_mirrors.csv` 将下列语句粘贴在文件末尾
-`"China (Xi'an)",China,Xi'an,http://202.117.120.246/mirrors/CRAN/,"Xidian University","Xidian University Open Source Community",1,cn`
+```
+"China (Xi'an)",China,Xi'an,http://202.117.120.246/mirrors/CRAN/,"Xidian University","Xidian University Open Source Community",1,cn
+```
 > 202.117.120.246为 linux.xidian.edu.cn所对应的ip地址
 5. 安装所需的包时，先运行`chooseCRANmirror(local.only=T)` 和 `chooseBioCmirror(local.only=T)`，分别选择“China (Xi'an)”作为所用源，即可使用开源社区的镜像；如需使用bioconductor库，则直接使用biocLite(pkg)即可