> 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/2021/04/21-engage.md).

# 21, 钻研

石墙高百尺，叠叠负何巨？\
树成不盈寸，一裂为根系。\
初生乃嫩弱，石缝堪汲取，\
我等生世间，何事怨贫瘠？

![](https://385430918-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M8iFCzaIpXf8zXqpE6I%2F-MYlMR3rf5uiN6KFkbMB%2F-MYlMYxuH5BYY0C6BAVN%2FIMG_4462.jpeg?alt=media\&token=a384d417-2f55-405b-a0e1-24649d6f8f9a)