萬物簡史:PART III CH 9威力巨大的原子（3）
來源：滬江聽寫酷
2012-01-19 07:00
今天我們來描述一下原子的渺小的尺寸。單個原子的渺小讓人難以想象，不過我們可以這么試一下——一把直尺上的最小刻度是一毫米，如果按比例這一毫米的高度是牛虐帝國大廈的高度的話，原子的大小只有一張紙厚度~~~~
?《萬物簡史》推出部落節(jié)目版，戳這里訂閱:http://bulo.hujiang.com/menu/6004/
文中需聽寫單詞或詞組用[-No-]表示，句子用[---No---]表示。請邊聽寫邊理解文意，這樣可以提高聽力準(zhǔn)確度，并為訓(xùn)練聽譯打下基礎(chǔ)哦~~~
Hint:
the Empire State Building
Above all, atoms are tiny—very tiny indeed. [---1---] On such a scale an individual atom is [-2-] impossible to imagine, but we can of course try.
Start with a line at length of a millimeter. Now imagine that line divided into 1000 equal widths. Each of those widths is a micron. This is the scale of microorganisms. A typical paramecium, for instance, is about two microns wide, 0.002 millimeters, which is really very small. If you wanted to see with your [-3-] a paramecium swimming in a drop of water, you would have to enlarge the drop until it was some 40 feet across. [---4---]
Atoms, in other words, exist on a scale of minuteness of another order altogether. To [-5-] to the scale of atoms, you would need to take each one of those micron [-6-] and shave it into 10000 finer widths. That's the scale of an atom: one ten-millionth of a millimeter. [---7---]
?《萬物簡史》推出部落節(jié)目版，戳這里訂閱:http://bulo.hujiang.com/menu/6004/
文中需聽寫單詞或詞組用[-No-]表示，句子用[---No---]表示。請邊聽寫邊理解文意，這樣可以提高聽力準(zhǔn)確度，并為訓(xùn)練聽譯打下基礎(chǔ)哦~~~
Hint:
the Empire State Building
Above all, atoms are tiny—very tiny indeed. [---1---] On such a scale an individual atom is [-2-] impossible to imagine, but we can of course try.
Start with a line at length of a millimeter. Now imagine that line divided into 1000 equal widths. Each of those widths is a micron. This is the scale of microorganisms. A typical paramecium, for instance, is about two microns wide, 0.002 millimeters, which is really very small. If you wanted to see with your [-3-] a paramecium swimming in a drop of water, you would have to enlarge the drop until it was some 40 feet across. [---4---]
Atoms, in other words, exist on a scale of minuteness of another order altogether. To [-5-] to the scale of atoms, you would need to take each one of those micron [-6-] and shave it into 10000 finer widths. That's the scale of an atom: one ten-millionth of a millimeter. [---7---]
Half a million of them lined up shoulder to shoulder could hide behind a human hair.
essentially
naked eye
However, if you wanted to see the atoms in the same drop, you would have to make the drop 15 miles across.
get down
slices
It is a degree of slenderness way beyond the capacity of our imaginations, but you can get some idea of the proportions if you bear in mind that one atom is to the width of a millimeter line as the thickness of a sheet of paper is to the height of the Empire State Building.
而且，原子很小--確實很小。50萬個原子排成一行還遮不住一根人的頭發(fā)。以這樣的比例，一個原子小得簡直無法想像。不過，我們當(dāng)然可以試一試。
先從1毫米著手，就是這么長的一根線：－?，F(xiàn)在，我們來想像一下，這根線被分成了寬度相等的1000段。每一段的寬度是1微米。這就是微生物的大小。比如，一個標(biāo)準(zhǔn)的草履蟲--一種單細(xì)胞的淡水小生物--大約為2微米寬，也就是0.002毫米，它確實小得不得了。要是你想用肉眼看到草履蟲在一滴水里游，你非得把這滴水放大到12米寬。然而，要是你想看到同一滴水里的原子，你非得把這滴水放大到24公里寬。
換句話說，原子完全存在于另一種微小的尺度上。若要知道原子的大小，你就得拿起這類微米大小的東西，把它切成10000個更小的東西。那才是原子的大小：1毫米的千萬分之一．這么小的東西遠(yuǎn)遠(yuǎn)超出了我們的想像范圍。但是，只要記住，一個原子對于上述那條1毫米的線，相當(dāng)于一張紙的厚度對于紐約帝國大廈的高度，它的大小你就有了個大致的概念。
