物理系统的对称性反映在其能级的简并性上。

The key to success in business is not just about making money, but about creating value for customers.

有时候最难的事情和最正确的事情是同一件事。

The key to successful investing is to have a clear understanding of the risks and rewards, a disciplined approach, a long-term perspective, and a strong understanding of the fundamentals.

Art is not a luxury, but a necessity.