送交者: suprathinker 于 2010-01-08, 12:51:27:

回答: Adam Smith (rephrase): Only best personal interest 由 潜伏九号 于 2010-01-08, 12:40:46:

• individual need not to understand this - 潜伏九号 (154 bytes) 2010-01-08, 13:00:18 (402268)

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