The past is never really past; it lingers in the corners of our lives.
可持续性不是选择，而是我们对后代的责任。
We are all blind, but some of us can see.
数学中最重要的是理解概念，而不仅仅是记忆公式。
阅读是不动的旅行，写作是让他人旅行。