讲诚信，是天下行为准则的关键。

在被记录之前，什么都没有真正发生过。

In mathematics, the simplest questions often lead to the most profound discoveries.

War is the ultimate human drama, where the best and worst of humanity is revealed.

Innovation in forestry technology will redefine how we manage and conserve our forests.

城市是一个有生命的实体，建筑必须对此作出回应。