2015-05-15 BBC:星光七纪元-34

 He was sure that when a supernova exploded, it left behind a kernel¹ so dense² that a cupful would be as heavy as a mountain, he called it a neutron³ star, it seems so preposterous⁴ that Z's ideas were dismissed, until that is a new way of scouring⁵ the heavens emerged, radio astronomy. In 1967 the fledgling displine picked up a strange repetitive message from outer space.Now the people here say that if they got three signals as exactly space as that, it would be very unusual, if they got four, it would be phenomenal, well they've had pulses as exactly space as that 24 hours of the day since November.

These pulses were so exact and predictable in their pattern that scientists even considered aliens as their source, it turned out they were being transmitted by something equally unlikely and just as unfamiliar⁶.

The most important question of all what are they, well we know that they are very small, they are objects about the size of a planet, we know also that they are very energetic and the source of energy must be far greater than a planet could really provide, it must be something like a star compressed into a volume the size of a planet.

Scientists worked out that the new star had to be denser⁷ than any type previously⁸ discovered.

1 kernel   

n.(果实的)核，仁；(问题)的中心，核心

参考例句：

• The kernel of his problem is lack of money.他的问题的核心是缺钱。
• The nutshell includes the kernel.果壳裹住果仁。

2 dense   

a.密集的，稠密的，浓密的；密度大的

参考例句：

• The general ambushed his troops in the dense woods. 将军把部队埋伏在浓密的树林里。
• The path was completely covered by the dense foliage. 小路被树叶厚厚地盖了一层。

3 neutron   

n.中子

参考例句：

• Neutron is neutral and slightly heavier than the proton.中子是中性的，比质子略重。
• Based on the neutron energy,the value of weighting factor was given.根据中子能量给出了相应的辐射权重因子的数值。

4 preposterous   

adj.荒谬的，可笑的

参考例句：

• The whole idea was preposterous.整个想法都荒唐透顶。
• It would be preposterous to shovel coal with a teaspoon.用茶匙铲煤是荒谬的。

5 scouring   

擦[洗]净，冲刷，洗涤

参考例句：

• The police are scouring the countryside for the escaped prisoners. 警察正在搜索整个乡村以捉拿逃犯。
• This is called the scouring train in wool processing. 这被称为羊毛加工中的洗涤系列。

6 unfamiliar   

adj.陌生的，不熟悉的

参考例句：

• I am unfamiliar with the place and the people here.我在这儿人地生疏。
• The man seemed unfamiliar to me.这人很面生。

7 denser   

adj. 不易看透的, 密集的, 浓厚的, 愚钝的

参考例句：

• The denser population necessitates closer consolidation both for internal and external action. 住得日益稠密的居民，对内和对外都不得不更紧密地团结起来。 来自英汉非文学 - 家庭、私有制和国家的起源
• As Tito entered the neighbourhood of San Martino, he found the throng rather denser. 蒂托走近圣马丁教堂附近一带时，发现人群相当密集。

8 previously   

adv.以前，先前（地）

参考例句：

• The bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。
• Let me digress for a moment and explain what had happened previously.让我岔开一会儿，解释原先发生了什么。