我想知道如何解决require在安装Ruby 2.2.1Windows 安装程序和Ruby gem 2.4.6.
LoadError: cannot load such file -- ffi_c
from C:/Ruby22-x64/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_req
uire.rb:54:in `require'
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这是像DLL吗?