> 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/2017/08/19.md). # 19 譬如一只漂浮在水面的鱼缸。小鱼在鱼缸里游泳，看到外面的世界，无比羡慕和向往。到外面非常难，可是如果借助水花、风雨，甚至靠自己还是可以归于江海。早安，世界。早安，未来。早安，开始飞跃的你。