That's because the old idea about time was that it was like a cosmic metronome keeping a regular and constant beat throughout the universe.
这是因为传统上人们认为时间就如同一个巨大的节拍器，在宇宙空间中持续着同一种节奏，而且只沿着一个方向运动。
However, the small cosmological constant and cosmic coincidence problem cannot be resolved within the known laws of physics, which is the famous cosmological constant problem in physics and astronomy.
然而现有物理学理论还无法给出合理的解释，因此宇宙学常数问题成为物理学和天文学上最重大的疑难之一。
However, the small cosmological constant and cosmic coincidence problem cannot be resolved within the known laws of physics, which is the famous cosmological constant problem in physics and astronomy.
然而现有物理学理论还无法给出合理的解释，因此宇宙学常数问题成为物理学和天文学上最重大的疑难之一。
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