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英国学生科学读本 第57期:硫(2)

时间:2017-01-12 02:07来源:互联网 提供网友:mapleleaf   字体: [ ]
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   The fumes1 of burning sulphur will bleach2 straw, silk, and other things, and make them white and clean. These fumes are also useful for killing3 the germs which cause fevers and other diseases.

  燃烧的硫磺冒出的烟,可以“漂白”稻草、丝绸和其他的物品,让它们变得又白又干净。这种烟,还能杀死那些导致发烧和其他疾病的细菌。
  Let us put some bits of roll sulphur in an iron spoon, and hold the spoon over a clear fire. The sulphur soon melts into a clear yellow liquid. If we let this melted sulphur get hotter, it will become thick, and nearly black in colour.
  咱们把一根硫棒的一些碎屑,放进一个铁勺子里。把铁勺子举到明火上,硫很快就会熔化,变成一种清澈的黄色液体。要是继续加热这种熔化的硫,它就会变得粘稠,颜色也会几乎变成黑色。
  With more heat still, the sulphur will become thin again; and if we then pour it into cold water, it will change into a soft brown mass almost like india-rubber. After a few days, this will become hard and yellow again. If the sulphur is made very hot indeed, it will turn into yellow sulphur vapour.
  继续加热,硫会再次变稀;把它倒进冷水中,会变成一种棕色的软东西,差不多有点像天然橡胶。几天之后,这东西就会变回又硬又黄的状态。如果把硫磺加热到极高的温度,会化作黄色的硫蒸汽。
  Sulphur is a mineral. It is found near volcanoes, and must have been brought up by them from a very great depth. It is also found in the earth joined with other elements, in the form of stony4 masses called ores.
  硫是一种矿物,可以在火山附近找到,显然是火山从地球深处带上来的。在地下也可以找到跟其他元素混在一起的硫磺,形态是类似石头的东西,叫做“矿石”。
  But sulphur is not a metal. It has qualities very different from those of the metals. A metal conducts heat well. If you put one end of a metal rod into the fire, the other end soon grows hot also. But sulphur conducts heat very badly.
  但硫磺并不是金属,它的特性跟金属的特性很不一样。金属的“导热性”非常好,如果把一根金属棒的一头放到火中,另一头很快也会变热。但是硫磺的导热性却很差。
  Metals have also a lustrous5 or shining surface, but sulphur has no lustre6. For these reasons sulphur is said to be a non-metal—that is, an element which is not a metal.
  金属也有一种“有光泽的”或是“亮闪闪的”表面,但硫却没有光泽。所以人们把硫磺叫做“非金属”,也就是“不是金属的元素”。

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1 fumes lsYz3Q     
n.(强烈而刺激的)气味,气体
参考例句:
  • The health of our children is being endangered by exhaust fumes. 我们孩子们的健康正受到排放出的废气的损害。
  • Exhaust fumes are bad for your health. 废气对健康有害。
2 bleach Rtpz6     
vt.使漂白;vi.变白;n.漂白剂
参考例句:
  • These products don't bleach the hair.这些产品不会使头发变白。
  • Did you bleach this tablecloth?你把这块桌布漂白了吗?
3 killing kpBziQ     
n.巨额利润;突然赚大钱,发大财
参考例句:
  • Investors are set to make a killing from the sell-off.投资者准备清仓以便大赚一笔。
  • Last week my brother made a killing on Wall Street.上个周我兄弟在华尔街赚了一大笔。
4 stony qu1wX     
adj.石头的,多石头的,冷酷的,无情的
参考例句:
  • The ground is too dry and stony.这块地太干,而且布满了石头。
  • He listened to her story with a stony expression.他带着冷漠的表情听她讲经历。
5 lustrous JAbxg     
adj.有光泽的;光辉的
参考例句:
  • Mary has a head of thick,lustrous,wavy brown hair.玛丽有一头浓密、富有光泽的褐色鬈发。
  • This mask definitely makes the skin fair and lustrous.这款面膜可以异常有用的使肌肤变亮和有光泽。
6 lustre hAhxg     
n.光亮,光泽;荣誉
参考例句:
  • The sun was shining with uncommon lustre.太阳放射出异常的光彩。
  • A good name keeps its lustre in the dark.一个好的名誉在黑暗中也保持它的光辉。
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