The most important thing is to be honest with yourself and with your audience.

看到父母脸上的喜悦是无与伦比的回报。

Act as if what you do makes a difference. It does.

The balance of power is the only way to maintain peace in the international system.

量子力学的美在于它能够描述最小尺度下粒子的行为，即使它违背了我们的经典直觉。