中年之后，只有已为告别人生做好准备的人，才能继续在生活中朝气蓬勃。

把你的伤痛转化为智慧。

绿色发展不是选择题，而是必答题，我们要坚定不移地走绿色低碳发展之路。

I don't see limits. I see possibilities.

The United States, in their expansive capacity, are capable of containing within their limits the whole population of the earth.

数学中最重要的是理解概念，而不仅仅是记忆公式。

The world doesn't have to be like this. Things can be different.

我们必须不断挑战现状以推动有意义的进步。

死亡不是终结，而是宇宙宏大叙事中的状态改变。