> 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/2017/12/14.md). # 14 未来如果已来，那就是现在。现在如果过去就是过去。未来可以改变吗？那就是现在呀。过去可以改变吗？那就是现在啊。早安，世界。早安，未来。早安，现在的你。