礼义法度，是随着时势而变化的。

"In observational studies, we often have to rely on assumptions that are not directly testable."

In the wild, every decision can mean the difference between life and death.

数据库技术的未来在于能够高效处理多种数据类型和大规模数据。

In mathematics, the journey from confusion to clarity is the most rewarding experience.

最成功的企业是那些真正关心员工的企业。

The only limit to our realization of tomorrow is our doubts of today.