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宇宙的形成:大爆炸(6)

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And for the record, that's faster than the speed of light. But wait. Doesn't that break one of the Laws of Physics?Even school children know that you quote: you can't go faster than the speed of light.But actually there is a loophole there. You see nothing can go faster than light, nothing being empty space.

记录显示那比光速更快。但是且慢。那会打破其中一条物理学定律吗?就连学校的学生都知道的那条定律:世界上最快的是光速。但实际上,这句话有漏洞。没有什么快于光速,而你所说的没什么是指空无一物的空间。

Don't worry. This idea gives even the best minds in science a headache. But it's critical to understanding the early universe. Scientists think it took less than a millionth of a millionth of a millionth of a millionth of a second for the universe to expand from the size of an atom to a baseball.That may not sound like much, but it's like a golf ball expanding to the size of the earth in the same amount of time.

别担心,就算是最聪明的科学家也会对此感到头疼。然而了解早期的宇宙确实至关重要。科学家们认为如原子般大的宇宙膨胀到棒球大小需要的时间不超过万万万万亿分之一。也许听起来不是很形象,但这相当于花同样的时间由高尔夫球膨胀到地球样大小。

That means it was expanding faster than the speed of light. That's fast. So many things were happening so fast in the early universe. Because everything was so close together that we needed a new unit of time to describe things.

这就意味着宇宙膨胀速度快于光速。那非常快。在早期的宇宙,许多事件发生得太快。因为每事件紧挨着发生,所以需要一个新的时间单位来描述物质的运动。

It's called 'Planck Time'. To understand just how short of 'Planck Time' is, consider this, there're more units of 'Planck Time' in one second than all the seconds since the Big Bang. The math is mind-blowing. There're more than 31 million seconds in a year and it's been 14 billion years since the Big Bang. So multiply 31,556,926 by 14 billion and what you get. It's a really big number.

新的时间单位就是“普朗克时间”。要明白普朗克时间有多短,先要知道普朗克时间每秒包括的单位比大爆炸以来所有秒包括的单位都要多。计算起来很费脑筋。每年有3千多万秒,自大爆炸已经有140亿年了。140亿乘以31,556,926等于多少。一个巨大的数字。

It's a time scale that's so small that all human intuition goes out (of) the window. If we look at our watches and measure one second, we can ask how many 'Planck Times' is that. Well, it is a billion billion billion billion billion 'Planck Times'.

普朗克时间的时间段太小,超出了人类洞察力范畴。如果看表估量一秒钟,我们可以问这一秒钟的普朗克时间是多少。这么说吧,这一秒等于10的36次方普朗克时间。

So, now the Big Bang is only a few 'Planck Times' old in exploding mass of pure energy expanding faster than the speed of light. In the next few 'Planck Times', the universe as we know it will be born.

因此,大爆炸开始的一瞬大量纯能量以快于光速的速率爆发膨胀,这个过程所用的普朗时间很短。接下来,在又一段很短的普朗克时间内宇宙就诞生了。

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重点单词   查看全部解释    
critical ['kritikəl]

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adj. 批评的,决定性的,危险的,挑剔的
a

 
expanding [iks'pændiŋ]

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扩展的,扩充的

 
mass [mæs]

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n. 块,大量,众多
adj. 群众的,大规模

 
multiply ['mʌltiplai]

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vt. 乘,增加
vi. 扩大,繁衍,做乘法<

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expand [iks'pænd]

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v. 增加,详述,扩展,使 ... 膨胀,
v

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understand [.ʌndə'stænd]

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vt. 理解,懂,听说,获悉,将 ... 理解为,认为<

 
measure ['meʒə]

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n. 措施,办法,量度,尺寸
v. 测量,量

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baseball ['beis.bɔ:l]

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n. 棒球

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quote [kwəut]

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n. 引用
v. 引述,举证,报价

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scale [skeil]

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n. 鳞,刻度,衡量,数值范围
v. 依比例决

 

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