Incomplete summary on environment variables
This article is reprinted from https://f2h2h1.github.io/article/%E5%85%B3%E4%BA%8E%E7%8E%AF%E5%A2%83%E5%8F%98%E9%87%8F %E7%9A%84%E4%B8%8D%E5%AE%8C%E6%95%B4%E6%80%BB%E7%BB%93.html
This site is for inclusion only, and the copyright belongs to the original author.