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Từ điển WordNet v3.1 - WordNet Dictionary
closed universe
(cosmology) a universe that is spatially closed and in which there is sufficient matter to halt the expansion that began with the big bang; the visible matter is only 10 percent of the matter required for closure but there may be large amounts of dark matter • Topics: cosmology, cosmogony, cosmogeny • Hypernyms: universe, existence, creation, world, cosmos, macrocosm
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