The most popular theory of our universe's origin centers on a cosmic cataclysm unmatched in all of history—the big bang.
关于宇宙诞生的最流行的理论的核心的部分是一次史无前例的宇宙巨变——大爆炸。
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The sidereal diurnal variation of cosmic ray ties up with the most basic and important problem in cosmic ray physics such as the origin, propagation and the acceleration mechanisms of cosmic ray.