市场是一个复杂的系统，我们试图用模型来简化它。
The secret of living is to own a convertible and a lake...If the sun is shining, you can rid around in your convertible and be happy...If it starts to rain, it won't spoil your day because you can just say, 'Oh, well, the rain will fill up my lake!'"”
大自然是伟大的老师，当别人睡觉时，我从她那里学得最好。