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单词 vacuum
释义 vacuum
[`vak·yǝm]
PHYSICS
1. Theoretically, a space in which there is no matter.
2. Practically, a space in which the pressure is far below normal atmospheric pressure so that the remaining gases do not affect processes being carried on in the space.
QUANTUM MECHANICS
The lowest possible energy state of a system, conceived of as a polarizable gas of virtual particles, fluctuating randomly.
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