> 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/2017/07/07.md).

# 07

当看到一只鸟，走起来像鸭子，游泳起来像鸭子，叫起来像鸭子，那么这只鸟就可以被称为鸭子。你可以觉得别人说你是丑小鸭而觉得自己不美丽，可是你是天鹅呢。早安，世界。早安，未来。早安，你。

<figure><img src="https://385430918-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M8iFCzaIpXf8zXqpE6I%2Fuploads%2F5dAbAvtMJ955W3V1tk3e%2Fimage.png?alt=media&amp;token=2607c6a4-f814-45d7-bb1b-2eb7f0da1a1b" alt=""><figcaption></figcaption></figure>