Also, microwave detectors reveal an almost perfectly smooth curtain of radiation emanating from very early times: the cosmic microwave background, a relic of the primordial fireball.

• 同样，微波探测仪揭示了来自宇宙早期的近乎完美光滑的辐射谱线:宇宙微波背景辐射，最初火球的遗留物。