The history of all hitherto existing society is the history of class struggles.
至今一切社会的历史都是阶级斗争的历史。
We must always question our assumptions and be willing to revise our theories in light of new evidence.
强调历史研究既要理解历史背景，又要保持学术批判性。
创新不仅仅是新点子，而是让这些点子成为现实。
可持续性不是一种选择，而是我们对后代的责任。
我不知道我有多高或多重。因为我不在乎。
The future of transportation is electric, and China will lead this revolution.
The solution of the problem of life is seen in the vanishing of the problem.