可持续性不再是可选项，而是生存的必需品。

The art of any culture is the exponent of its social relationships.

"Every experiment is a conversation with nature, and nature always has something to say."

我从十五岁开始致力于学习，三十岁便能自立于社会了，四十岁对各种事理不再迷惑不解，五十岁懂得了自然界的规律，六十岁对听到的事情能领会贯通，并能辨别是非真伪，七十岁时做事能随心所欲，但又不会超出礼法的规范。