Sustainability must be profitable, or it won't be sustainable.
可持续性必须有利可图,否则它就无法持续。
检验一个经济学家是否优秀的标准,是看他能否比别人更好地解释过去。
When you do something best in the world, you can’t really improve on that.
Singing is about expressing what cannot be said in words.