当我们通过 gem 安装的工具，比如 step4 要提到的 bundler、或者著名框架 rails 他们的命令本身都可以被当成可执行命令执行Irrespective of how again and again I've read your content, I still understand new things with every single reserve. Thanks!We benefited from all of Zid's companies, like very simple payment