要发出紧急信号，使用“重要的事情说三遍”的“三”法则；三次呼喊、三声喇叭或三声哨声。

A mathematician is a maker of patterns, like a painter or a poet.

"Imagination is the most powerful tool we have to create a better world."

The tragedy of great power politics is that even well-intentioned states are forced to act in ways that can lead to conflict and war.

如果你想走得快，就独自前行；如果你想走得远，就结伴同行。