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1. Oxford American Dictionary

   Maxwell's demon

   • n.
     a hypothetical being imagined as controlling a hole in a partition dividing a gas-filled container into two parts, and allowing only fast-moving molecules to pass in one direction, and slow-moving molecules in the other. This would result in one side of the container becoming warmer and the other cooler, in violation of the second law of thermodynamics.
2. • 更多解釋

   Maxwell's demon

   • n.
     a hypothetical being imagined as controlling a hole in a partition dividing a gas-filled ...

   Oxford Dictionary