万物简史:PART III CH 9威力巨大的原子（3）
来源：沪江听写酷
2012-01-19 07:00
今天我们来描述一下原子的渺小的尺寸。单个原子的渺小让人难以想象，不过我们可以这么试一下——一把直尺上的最小刻度是一毫米，如果按比例这一毫米的高度是牛虐帝国大厦的高度的话，原子的大小只有一张纸厚度~~~~
❤《万物简史》推出部落节目版，戳这里订阅:http://bulo.hujiang.com/menu/6004/
文中需听写单词或词组用[-No-]表示，句子用[---No---]表示。请边听写边理解文意，这样可以提高听力准确度，并为训练听译打下基础哦~~~
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---]
❤《万物简史》推出部落节目版，戳这里订阅:http://bulo.hujiang.com/menu/6004/
文中需听写单词或词组用[-No-]表示，句子用[---No---]表示。请边听写边理解文意，这样可以提高听力准确度，并为训练听译打下基础哦~~~
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--确实很小。50万个原子排成一行还遮不住一根人的头发。以这样的比例，一个原子小得简直无法想像。不过，我们当然可以试一试。
先从1毫米着手，就是这么长的一根线：－。现在，我们来想像一下，这根线被分成了宽度相等的1000段。每一段的宽度是1微米。这就是微生物的大小。比如，一个标准的草履虫--一种单细胞的淡水小生物--大约为2微米宽，也就是0.002毫米，它确实小得不得了。要是你想用肉眼看到草履虫在一滴水里游，你非得把这滴水放大到12米宽。然而，要是你想看到同一滴水里的原子，你非得把这滴水放大到24公里宽。
换句话说，原子完全存在于另一种微小的尺度上。若要知道原子的大小，你就得拿起这类微米大小的东西，把它切成10000个更小的东西。那才是原子的大小：1毫米的千万分之一．这么小的东西远远超出了我们的想像范围。但是，只要记住，一个原子对于上述那条1毫米的线，相当于一张纸的厚度对于纽约帝国大厦的高度，它的大小你就有了个大致的概念。
