Ruby Gem install display error (GEM::REMOTEFETCHER::FETCHERROR)

Today is free to install the current more mature CSS preprocessor--sass, Baidu on the internet a bit, http://blog.csdn.net/zhouzme/article/details/45059419 according to the steps of the landlord installation,

Install sass suddenly appeared problem, display error (GEM::REMOTEFETCHER::FETCHERROR), this can be swollen? Find a lot of methods do not work, and then run to https://rubygems.org/go, find file sass, in cmd paste gem ' sass ', ' ~> 3.4 ', ' >= 3.4.21 ' (Click the black button can be copied)

However, the error, English is not good ignore it

Re-copy gem install sass

Miracle happened: actually installed successfully, although not very clear what is meant, is it luck? And then I tried to install less with this method, and it worked.

Ruby Gem install display error (GEM::REMOTEFETCHER::FETCHERROR)