弦理论是二十一世纪物理学的一部分，偶然落入了二十世纪。
The best performance improvement is the transition from the nonworking state to the working state.
最重要的是享受你的生活——要快乐——这才是最重要的。
The highest possible stage in moral culture is when we recognize that we ought to control our thoughts.
The best anti-poverty program is a growing economy with good jobs.