孩子本身就是一个现实，而不仅仅是一个过渡性的存在。
The child is a reality in himself, and not merely a transitional being.
史记
数学是人类精神最美丽和最强大的创造。
The more you know, the more you can imagine. The more you imagine, the more you can know.
Success is not final, failure is not fatal: It is the courage to continue that counts.