Data reveals the truth: Most poor people are not lazy.
数据揭示的真相：多数穷人并非懒惰者。
The true measure of our success is not just profits, but the positive impact we leave behind.
The longer life goes on, the fewer those around you to challenge your account of things, to remind you that life is not as you tell it, but as you remember it.
The more you know, the more you realize you don't know.
The world is a fine place and worth fighting for.
模型的目的是足够简单以便理解和使用，但又足够复杂以捕捉系统的基本特征。