最危险的故事是我们讲给自己的故事。
"The most dangerous stories are the ones we tell ourselves."
投资农民教育能带来最高的回报。
Human life can not be measured by the length of time. When the heart is full of love, the moment is eternal! ——It really can’t be measured by the length of time.
数学是概念之间关系的科学，与内容无关。