计算理论为理解什么可以计算、什么不能计算提供了基础。
The theory of computation provides a foundation for understanding what can and cannot be computed.
The future belongs to those who see opportunities where others see challenges.
Don't walk behind me; I may not lead. Don't walk in front of me; I may not follow. Just walk beside me and be my friend.
历史的地理枢纽是世界上从政治战略角度看最重要的区域。