死者并未死去。他们在记忆中活着。

Courage doesn't always roar. Sometimes courage is the quiet voice at the end of the day saying, "I will try again tomorrow."

The study of mathematics is a constant dialogue between the concrete and the abstract.

一个国家的真正财富来自于它的土壤。

Persistence is key in mathematical research; many great results come from long struggles.

建筑师必须是城市肌体的治愈者。