程序包‘colorspace’打开成功，MD5和检查也通过
程序包‘Rcpp’打开成功，MD5和检查也通过
错误于read.dcf(file.path(pkgname, "DESCRIPTION"), c("Package", "Type")) :
  无法打开链结
此外: 警告信息：
1: In download.file(url, destfile, method, mode = "wb", ...) :
  downloaded length 1195 != reported length 75234
2: In download.file(url, destfile, method, mode = "wb", ...) :
  downloaded length 207052 != reported length 1154482
3: In unzip(zipname, exdir = dest) : 从zip文件中抽取1时出了错
4: In read.dcf(file.path(pkgname, "DESCRIPTION"), c("Package", "Type")) :
  无法打开压缩文件'stringr/DESCRIPTION'，可能是因为'No such file or directory'
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全部都下载下来了，就是这样，安装不上，求大神援手。。。。。。