过去是一个跟随我们的影子，一个困扰我们的幽灵。

The challenge in cryptography is not just to create unbreakable codes, but to create systems that remain secure even as technology evolves.

The challenge is to make something ordinary extraordinary.

What I regret most in my life are failures of kindness.

"Every story is a journey, and every journey is a story."

The path to decarbonization requires collaboration across industries, governments and communities.

行动就是希望。