> 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/2017/05/29.md).

# 29

它发生，让它发生。它存在，它早已存在。早安，世界，早安，感知未来的你。

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