李沉简：挺直脊梁 拒做犬儒（北大一二〇纪念）

https://chinadigitaltimes.net/chinese/2018/03/%E6%9D%8E%E6%B2%89%E7%AE%80%EF%BC%9A%E6%8C%BA%E7%9B%B4%E8%84%8A%E6%A2%81-%E6%8B%92%E5%81%9A%E7%8A%AC%E5%84%92%EF%BC%88%E5%8C%97%E5%A4%A7%E4%B8%80%E4%BA%8C%E3%80%87%E7%BA%AA%E5%BF%B5%EF%BC%89/

https://www.youtube.com/watch?v=BqsJ263SFoM

https://www.youtube.com/watch?v=Xv4H2IDO9cA