安全困境是国际政治的一个基本特征，因为国家增加自身安全的努力往往会降低其他国家的安全。

"We always overestimate the change that will occur in the next two years and underestimate the change that will occur in the next ten. Don't let yourself be lulled into inaction."

I'm not a role model. I'm a model role.

Remember, if you ever need a helping hand, you'll find them at the end of each of your arms. As you grow older, you will discover that you have two hands, one for helping yourself, the other for helping others.

The only way to find yourself is to lose yourself in something greater.

The pace of change will never be slower than it is today.

感恩是一种简单的实践，可以对你的幸福感产生深远的影响。

"Love is the only thing that transcends time and place."

创新是任何行业的命脉，那些无法适应的人将被淘汰。