你必须不断思考你能做些什么来让世界变得更美好。
You have to keep thinking about what you can do to make the world a better place.
我总是在寻找那些挑战我并让我走出舒适区的角色。
勇气不是没有恐惧，而是继续前进的意志。
The modern state is characterized by its ability to concentrate and use power in a way that premodern states could not.
天然气开采的创新是满足世界日益增长的能源需求的关键。
If you're not stubborn, you'll give up on experiments too soon. And if you're not flexible, you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve.