实现明天的唯一限制将是我们今天的疑虑。
The only limit to our realization of tomorrow will be our doubts of today.
经济景观是一个由不同等级的中心地组成的系统，每个中心地为特定区域服务。
有些书最好的部份仅止于封面与书背。
事实上，自然科学长期以来只是大脑和想象力的产物：现在是时候回归到对物质和显而易见事物的朴素而健全的观察上了。
If you want to fly, you have to give up what weighs you down.
Innovation in forestry isn't optional—it's essential for survival.
"I'm a diamond in the rough, shining like a piece of gold."
I don't follow trends. I set them.