制革厂的废物流比任何使命宣言都更清晰地讲述其道德故事。
A tannery's waste stream tells the story of its ethics more clearly than any mission statement.
真正的理解来自于把握问题的内在结构关系
Randomized evaluations can help us understand what works and what doesn't in development.
有时候，沉默比语言更有力量。
与人谈话时尽可以积德，与妻子儿女融洽相处也是修身养性的好机会。
我们都是生命之书中的章节。