可持续性不是一种选择;而是我们对后代的责任。
Nature is the greatest teacher and I learn from her best when others are asleep.
最成功的领导者是那些倾听多于说话的人。
数学的快乐来自于复杂事物变得简单的清晰时刻。
The habits of life form the soul, and the soul forms the countenance.