送交者: 008 于 2007-04-06, 12:29:58:

回答: Plus, even common sense still needs scientific explaination 由 Latino2 于 2007-04-06, 12:28:09:

• It's a starting point to measure diminishing marginal utility in a laboratory - Latino2 (234 bytes) 2007-04-06, 12:48:28 (134468)
  • That's quite true. So it is important that they finally can measure something - 008 (375 bytes) 2007-04-06, 13:08:41 (134477)

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