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万物简史 第30期:走进太阳系(8)
添加时间:2018-05-12 09:10:44 浏览次数: 作者:未知
  • Now the first thing you are likely to realize is that space is extremely well named and rather dismayingly uneventful. 你可能首先意识到,空间这个名字起得极其恰当,空间是个平淡无奇的地方。

    Our solar system may be the liveliest thing for trillions of miles, but all the visible stuff in it 在几万亿公里范围内,最充满生气的要算我们的太阳系,而所有可看得见的东西

    the Sun, the planets and their moons, the billion or so tumbling rocks of the asteroid1 belt, comets, 太阳、行星及其卫星、小行星带的上亿块翻滚的岩石、彗星

    and other miscellaneous drifting detritus2 和别的各种飘浮的碎石

    fills less than a trillionth of the available space. 仅仅充满不足现有空间的万亿分之一。

    You also quickly realize that none of the maps you have ever seen of the solar system were remotely drawn3 to scale. 你还很快意识到,你所见到的太阳系图是根本不按比例制作的。

    Most schoolroom charts show the planets coming one after the other at neighborly intervals4 在教室里的大多数图上,行星们一颗挨着一颗,相距很近

    the outer giants actually cast shadows over each other in many illustrations 在许多插图里,外侧巨星的影子实际上落在彼此身上

    but this is a necessary deceit to get them all on the same piece of paper. 但是,为了把所有的行星画在同一张纸上,这种骗术也是必不可少的。

    Neptune5 in reality isn't just a little bit beyond Jupiter, it's way beyond Jupiter 海王星其实不是在土星以外一点儿,而是在土星以外很远的地方

    five times farther from Jupiter than Jupiter is from us, 它离土星的距离比土星离我们的距离还要远5倍。

    so far out that it receives only 3 percent as much sunlight as Jupiter. 它在外面那么遥远的地方,接受的阳光只有土星的3%。

    Such are the distances, in fact, that it isn't possible, in any practical terms, to draw the solar system to scale. 实际上,距离是那么遥远,无论如何不可能按比例来画太阳系图。

    Even if you added lots of fold-out pages to your textbooks 即使你在教科书里增加许许多多折页,

    or used a really long sheet of poster paper, you wouldn't come close. 或者使用长得不得了的标语纸,你也无法接近这个比例。

    On a diagram of the solar system to scale, with Earth reduced to about the diameter of a pea, 在一张成比例的太阳系图上,如果将地球的直径缩小到大约一粒豆子的直径,

    Jupiter would be over a thousand feet away and Pluto6 would be a mile and a half distant 土星便会在300多米以外,冥王星会在2.5公里外的远处

    and about the size of a bacterium7, so you wouldn't be able to see it anyway. 约为一个细菌的大小,因此你怎么也看不见它。

    On the same scale, Proxima Centauri, our nearest star, would be almost ten thousand miles away. 按照同样的比例,离我们最近的恒星比邻星会在1.6万公里以外。

    Even if you shrank down everything so that Jupiter was as small as the period at the end of this sentence, 即使你把一切都加以缩小,土星会像英文的句点那么小,

    and Pluto was no bigger than a molecule8, Pluto would still be over thirty-five feet away. 冥王星不超过分子的个儿,那么冥王星依然在10多米以外。

     10级    万物简史 
     单词标签: asteroid  detritus  drawn  intervals  Neptune  Pluto  bacterium  molecule 


    1 asteroid [ˈæstərɔɪd] uo1yD   第9级
    • Astronomers have yet to witness an asteroid impacts with another planet. 天文学家还没有目击过小行星撞击其它行星。
    • It's very unlikely that an asteroid will crash into Earth but the danger exists. 小行星撞地球的可能性很小,但这样的危险还是存在的。
    2 detritus [dɪˈtraɪtəs] J9dyA   第12级
    • Detritus usually consists of gravel, sand and clay. 岩屑通常是由砂砾,沙和粘土组成的。
    • A channel is no sooner cut than it chokes in its own detritus. 一个河道刚被切割了不久,很快又被它自己的碎屑物质所充塞。
    3 drawn [drɔ:n] MuXzIi   第11级
    • All the characters in the story are drawn from life. 故事中的所有人物都取材于生活。
    • Her gaze was drawn irresistibly to the scene outside. 她的目光禁不住被外面的风景所吸引。
    4 intervals ['ɪntevl] f46c9d8b430e8c86dea610ec56b7cbef   第7级
    n.[军事]间隔( interval的名词复数 );间隔时间;[数学]区间;(戏剧、电影或音乐会的)幕间休息
    • The forecast said there would be sunny intervals and showers. 预报间晴,有阵雨。
    • Meetings take place at fortnightly intervals. 每两周开一次会。
    5 Neptune [ˈneptju:n] LNezw   第8级
    • Neptune is the furthest planet from the sun. 海王星是离太阳最远的行星。
    • Neptune turned out to be a dynamic, stormy world. 海王星原来是个有生气、多风暴的世界。
    6 Pluto [ˈplu:təʊ] wu0yF   第8级
    • Pluto was thought to be the furthest planet from the sun. 冥王星曾被认为是离太阳最远的行星。
    • Pluto has an elliptic orbit. 冥王星的轨道是椭圆形的。
    7 bacterium [bæk'tɪərɪəm] BN7zE   第7级
    n.(pl.bacteria )细菌
    • The bacterium possibly goes in the human body by the mouth. 细菌可能通过口进入人体。
    • A bacterium is identified as the cause for his duodenal ulcer. 一种细菌被断定为造成他十二指肠溃疡的根源。
    8 molecule [ˈmɒlɪkju:l] Y6Tzn   第7级
    • A molecule of water is made up of two atoms of hygrogen and one atom of oxygen. 一个水分子是由两个氧原子和一个氢原子组成的。
    • This gives us the structural formula of the molecule. 这种方式给出了分子的结构式。

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