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市场是一个复杂的系统,我们试图用模型来简化它。
The market is a complex system, and we try to simplify it with models.
The primary rules of obligation are those that require or forbid certain actions.
天下人都说这是他们努力的结果,不会说“这是我见到了命”。 
Sin is a thing that writes itself across a man’s face. It cannot be concealed.
投资清洁煤炭技术不是开支,而是对我们未来的投资。