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Big Bang

noun
🔊/ˌbɪɡ ˈbæŋ/
🔊/ˌbɪɡ ˈbæŋ/
 [singular]
(usually the Big Bang)
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  1. the single large event, followed by a rapid expansion, that most scientists suggest created the universe（宇宙的）创世大爆炸Topics Spacec1