You are not stuck where you are unless you decide to be.

真正重要的是质疑问题本身。

计算理论不仅仅是关于解决问题，还涉及理解可计算性的极限。

We must be vigilant and resolutely fight against all enemies, both internal and external.

强调历史研究既要理解历史背景，又要保持学术批判性。