GitHub中"watch" "star" "fork"三个按钮干什么用的？

总结下一般使用:
1.想拷贝别人项目到自己帐号下就fork一下。
2.持续关注别人项目更新就star一下
3.watch是设置接收邮件提醒的。
具体提醒有
Issues and their comments
Pull Requests and their comments
Comments on any commits