> 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/2017/04/15.md).

# 15

每天的变化不容易知道，总有一天会知道。早安，改变的你。

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