文化进化的研究必须考虑社会的内部动态和外部环境约束。

"The power of a story is in its ability to inspire forgiveness."

明天最棒的事情是，我会比今天更好。

The key to a successful database system is its ability to evolve with the changing needs of its users.

走向自由，不管在哪，都没有轻松的道路；多数人在到达渴望的巅峰之前，都必须一次又一次穿过被死亡阴影所垄罩的幽暗山谷。