> For the complete documentation index, see [llms.txt](https://www.oulan.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.oulan.com/2020/03/25.md).

# 25

每一个看起来不可能的事物都有阶梯。

![](https://385430918-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M8iFCzaIpXf8zXqpE6I%2Fuploads%2FdwXSWh3A5lZV0RNx8FfW%2F29831651281415_.pic.jpg?alt=media\&token=54f9639a-e472-42c0-886a-3123b911223b)