书籍是智慧的钥匙。
数学的美在于它让我们无需离开椅子就能探索宇宙。
I will hazard a prediction. When you are 80 years old, and in a quiet moment of reflection narrating for only yourself the most personal version of your life story, the telling that will be most compact and meaningful will be the series of choices you have made. In the end, we are our choices. Build yourself a great story.