经济学的奇妙任务是向人们展示,他们对自己想象中能够设计的东西知之甚少。
When the third appeared, he thrust at it with the knife, only to feel the blade[刀片] snap as the fish rolled. 
I've learned that you can't control everything in life, but you can control how you react to it.
The future of business is circular.