Our whole universe was in a hot, dense state, then nearly 14 billion years ago expansion started ... wait!

我们的宇宙是个大火炉，140亿年前大爆炸… … 稍等！

Thanks to these insights, along with the observed expansion of the universe and other evidence, we have learned that the universe began in a hot dense state, then cooled, and produced galaxies and clusters that we see today.

多亏了这些见解， 连同观测到的宇宙膨胀和其他证据，我们了解到宇宙开始时处于高温致密状态， 然后冷却，并产生了我们今天看到的星系和星团。