Homebrew默认安装脚本：
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
等待一段时间之后遇到下面提示，说明无法访问官方脚本地址：
curl: (7) Failed to connect to raw.githubusercontent.com port 443: Operation timed out
请使用中科大镜像来加速访问，脚本:
/usr/bin/ruby -e "$(curl -fsSL https://cdn.jsdelivr.net/gh/ineo6/homebrew-install/install)"
成功提示：
==> Installation successful!
