理性的公共使用是弥合道德与政治之间鸿沟的唯一途径。

You are never too old to set another goal or to dream a new dream.

痛苦的生活源于错误的比较。

Symbols are the medium of thought.

The conversation about coal must move beyond 'pro' or 'anti'—we need solutions, not slogans.

研究学习的唯一有意义的方法是通过客观测量。

用户需求是产品开发的出发点，也是落脚点。