The greatest wealth is to live content with little.
可持续增长的关键是不断改进并适应变化的环境。
礼义廉耻，可以用来要求自己，不可用来要求别人。要求自己则能少犯过失，要求别人则难以与人和睦相处，难以与他人相处就不合乎处世之道。所以君子只严格要求自己，小人则对别人求全责备。
Teachers are the most important role models in schools, the most instructive examples, and the most vivid examples for students.
Natural gas is the bridge fuel that will help us achieve a lower-carbon future.