手机APP下载

您现在的位置: ms196明仕亚洲 > 英语听力 > 双语有声读物 > 万物简史 > 正文

万物简史(MP3+中英字幕) 第53期:埃文斯牧师的宇宙(17)

来源:可可英语 编辑:liekkas   VIP免费外教试听课 |  可可官方微信:ikekenet
 下载MP3到电脑  批量下载MP3和LRC到手机
加载中..
At this point, about 4.5 billion years ago, an object the size of Mars crashed into Earth, blowing out enough material to form a companion sphere, the Moon. Within weeks, it is thought, the flung material had reassembled itself into a single clump, and within a year it had formed into the spherical rock that companions us yet. Most of the lunar material, it is thought, came from the Earth’s crust, not its core, which is why the Moon has so little iron while we have a lot. The theory, incidentally, is almost always presented as a recent one, but in fact it was first proposed in the 1940s by Reginald Daly of Harvard. The only recent thing about it is people paying any attention to it.
在这个时刻,大约在45亿年以前,一个火星大小的物体撞上了地球,炸飞了足够的材料来形成一颗伴星--月球。据认为,不出几个星期,被炸飞的材料已经重新聚成一团;不出一年,它变成了那个现在还陪伴着我们的岩石球体。据认为,构成月球的大部分材料来自地壳,不是地核,这就是月球上极少有铁的原因,而地球上铁却很多。顺便说一句,这个理论几乎总是被说成是最近提出的,而事实上,它最初由哈佛大学的雷金纳德•戴利于20世纪40年代提出。关于这个理论,惟一最近的事儿就是人们已经不大重视它了。
埃文斯牧师的宇宙.jpgWhen Earth was only about a third of its eventual size, it was probably already beginning to form an atmosphere, mostly of carbon dioxide, nitrogen, methane, and sulfur. Hardly the sort of stuff that we would associate with life, and yet from this noxious stew life formed. Carbon dioxide is a powerful greenhouse gas. This was a good thing because the Sun was significantly dimmer back then. Had we not had the benefit of a greenhouse effect, the Earth might well have frozen over permanently, and life might never have gotten a toehold. But somehow life did.
当地球还是它最终大小的大约三分之一的时候,它很可能已经开始形成大气,主要由二氧化碳、氮、甲烷和硫组成。我们几乎不会把这些东西与生命联系起来;然而,在这有毒的混杂物中,生命形成了。二氧化碳是一种强有力的温室气体。它是一样好东西,因为当时太阳已经弱多了。要是我们没有受益于温室效应,地球很可能已经永久被冰雪覆盖。生命也许永远找不到一块立足之地。但是,生命以某种方式出现了。
For the next 500 million years the young Earth continued to be pelted relentlessly by comets, meteorites, and other galactic debris, which brought water to fill the oceans and the components necessary for the successful formation of life. It was a singularly hostile environment and yet somehow life got going. Some tiny bag of chemicals twitched and became animate. We were on our way.
在之后的5亿年里,年轻的地球继续受到彗星、陨石和银河系里其他碎块的无情撞击。这个过程产生了蓄满海洋的水,产生了成功形成生命所必不可少的成分。这是个极不友好的环境,然而生命还是以某种方式开始了。有一小袋化学物质抽动一下,变成了活的。我们快要来到这个世界上了。
Four billion years later people began to wonder how it had all happened. And it is there that our story next takes us.
40亿年以后,人们开始想,这一切到底是怎么发生的?下面,我们就来讲讲这个故事。
重点单词   查看全部解释    
hostile ['hɔstail]
想一想再看
adj. 怀敌意的,敌对的
 
incidentally [.insi'dentəli]
想一想再看
adv. 附带地,偶然地,顺便地
 
associate [ə'səuʃieit]
想一想再看
n. 同伴,伙伴,合伙人
n. 准学士学位获得
联想记忆
benefit ['benifit]
想一想再看
n. 利益,津贴,保险金,义卖,义演
vt.
联想记忆
greenhouse ['gri:nhaus]
想一想再看
n. 温室,暖房
 
singularly
想一想再看
adv. 异常地;非常地;令人无法理解地
 
permanently ['pə:mənəntli]
想一想再看
adv. 永久地
 
relentlessly
想一想再看
adv. 残酷地,无情地
 
companion [kəm'pænjən]
想一想再看
n. 同伴,同事,成对物品之一,(船的)甲板间扶梯(或扶
联想记忆
stew [stju:]
想一想再看
n. 炖汤,焖,烦恼 v. 炖汤,焖,忧虑
联想记忆
发布评论我来说2句

    英语学习专题

    可可英语官方微信(微信号:ikekenet)

    每天向大家推送短小精悍的英语学习资料.

    添加方式1.扫描上方可可官方微信二维码。
    添加方式2.搜索微信号ikekenet添加即可。