Can a man still be brave if he’s afraid. That is the only time a man can be brave.

教育的根是苦的，但果实是甜的。

La ciudad no es solo un escenario, es un personaje más en la novela.

Collaboration across disciplines is essential for advancing our understanding of the universe.

语言是唯一的家园。

The mind is not a vessel to be filled, but a fire to be kindled.

Success is walking from failure to failure with no loss of enthusiasm.

We need to be vigilant about the security of the Internet.

我不知道极限在哪里，但我想去那里。