> 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/2019/12/02.md). # 02 列车奔驰在平原上，就像船行驶在海中央。轻轻的起伏摇晃，头枕着波浪。 早安，世界。早安，未来。