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In just a fraction of a second after the Big Bang, the building blocks of our Universe begin to take shape. But this first matter is like nothing we see today.
大爆炸后短短的一瞬間，宇宙的組成元素開始出現(xiàn)。但第一種物質(zhì)卻并非今日所見。
The stuff of matter has been very different over the ages of the Universe. What we now think is normal matter was not at all normal in the earliest moments of the Big Bang.
宇宙形成百億年以來，形成物質(zhì)的元素不斷變化。在現(xiàn)今宇宙里人們認(rèn)為很常見的物質(zhì)，在大爆炸最初時(shí)期并不存在。
That's because conditions were so extreme. There were no atoms yet. But there were tiny subatomic particles.
那是因?yàn)楫?dāng)時(shí)環(huán)境非常極端。那時(shí)還沒有原子，只有微小的次原子粒子。
In the earliest moments of the Big Bang, the Universe was so hot and dense. There were great amounts of energy. And so particles will be created all the time and energy and matter will transform back and forth in this hot dense soup.
大爆炸最初那一刻，宇宙溫度極高，密度極大，蘊(yùn)含了巨大的能量。因此才一直有粒子生成，能量和物質(zhì)在這高溫高密的大熔爐里反反復(fù)復(fù)互相轉(zhuǎn)化。
That earliest matter was too unstable to start forming the Universe as we know it. Think of it like this. Imagine rush hour at Grand Central in New York City as that superheated early Universe. The commuters racing through the main concourse are subatomic particles.
最早的物質(zhì)太不穩(wěn)定，從而不能形成我們所了解的宇宙。把紐約中心地帶高峰期想像成熾熱的早期宇宙，把在中央大廳飛速往返穿行的上班族想象成次原子粒子。
If you look at a crowd of people, a large crowd of people, they may appear randomly. That random, cocky motion is very similar to what was happening to the particles in the Universe in the earliest moments of the Big Bang.
如果你觀察一群人，一大群人，他們可能是隨機(jī)出現(xiàn)的。這種隨機(jī)的運(yùn)動(dòng)與大爆炸最初宇宙內(nèi)粒子的高速碰撞運(yùn)動(dòng)十分相似。
The extreme temperature of the early Universe energizes the subatomic particles. They appear. They disappear. They race around at incredible speeds. It's pure chaos.
早期宇宙內(nèi)的高溫提供給次原子粒子能量。它們不斷創(chuàng)生，湮滅，以驚人的速率運(yùn)動(dòng)，宇宙內(nèi)一片混亂。
It's like people. If they are excited and running around fast to catch trains at a train station, they have to move around quickly. But eventually they calm down and get slower. That's what's been happening to our Universe in a sense. The particles are moving around very fast and as Universe cools down, the particles move more slowly and in some sense, less randomly.
就像人類。如果人們?cè)诨疖囌緸橼s火車而到處奔跑，心煩意亂時(shí)，他們必須得快速移動(dòng)。但是最終他們會(huì)平靜下來，越跑越慢。從某種意義上宇宙也是這樣，起初粒子四處飛移，當(dāng)宇宙冷卻，粒子運(yùn)動(dòng)越來越慢，從某種意義上不再那么隨機(jī)了。
As the Universe cools, the particles stop changing back into energy.
當(dāng)宇宙冷卻，粒子不再轉(zhuǎn)化回能量的形式。
可可原創(chuàng)，未經(jīng)許可請(qǐng)勿轉(zhuǎn)載
