时间:2019-01-29 作者:英语课 分类:万物简史


英语课

   Mendeleyev dutifully completed his studies and eventually landed a position at the local university. There he was a competent but not terribly outstanding chemist, known more for his wild hair and beard, which he had trimmed just once a year, than for his gifts in the laboratory. However, in 1869, at the age ofthirty-five, he began to toy with a way to arrange the elements. At the time, elements were normally grouped in two ways—either by atomic weight(using Avogadro’s Principle) or by common properties (whether they were metals or gases, for instance). Mendeleyev’s breakthrough was to see that the two could be combined in a single table.


  门捷列夫兢兢业业地完成了学业,最后任职于当地的一所大学。他在那里是个称职的而又不很突出的化学家,更以他乱蓬蓬的头发和胡子而不是以他在实验室里的才华知名。他的头发和胡子每年只修剪一次。 然而,1869年,在他35岁的那一年,他开始琢磨元素的排列方法。当时,元素通常以两种方法排列--要么按照原子量(使用阿伏伽德罗定律),要么按照普通的性质(比如,是金属还是气体)。门捷列夫的创新在于,他发现二者可以合在一张表上。
  化学
  As is often the way in science, the principle had actually been anticipated three years previously 1 by anamateur chemist in England named John Newlands. He suggested that when elements were arranged by weight they appeared to repeat certain properties—in a sense to harmonize—at every eighth place along the scale. Slightly unwisely, for this was an idea whose time had not quite yet come, Newlands called it the Law of Octaves and likened the arrangement to the octaves on a piano keyboard. Perhaps there was somethingin Newlands’s manner of presentation, but the idea was considered fundamentally preposterous 2 and widelymocked. At gatherings 3, droller members of the audience would sometimes ask him if he could get his elements to play them a little tune 4. Discouraged, Newlands gave up pushing the idea and soon dropped from view altogether.
  实际上,门捷列夫的方法,3年以前一位名叫约翰·纽兰兹的英格兰业余化学家已经提出过,这是科学上常有的事。纽兰兹认为,如果元素按照原子量来进行排列,它们似乎依次每隔8个位置重复某些特点--从某种意义上说,和谐一致。有点不大聪明的是--因为这么做时间还不成熟--纽兰兹将其命名为"八度定律",把这种安排比做钢琴键盘上的八度音阶。纽兰兹的说法也许有点道理,但这种做法被认为是完全荒谬的,受到了众人的嘲笑。在集会上,有的爱开玩笑的听众有时候会问他,他能不能用他的元素来弹个小曲子。纽兰兹灰心丧气,没有再研究下去,不久就销声匿迹了。

adv.以前,先前(地)
  • The bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。
  • Let me digress for a moment and explain what had happened previously.让我岔开一会儿,解释原先发生了什么。
adj.荒谬的,可笑的
  • The whole idea was preposterous.整个想法都荒唐透顶。
  • It would be preposterous to shovel coal with a teaspoon.用茶匙铲煤是荒谬的。
聚集( gathering的名词复数 ); 收集; 采集; 搜集
  • His conduct at social gatherings created a lot of comment. 他在社交聚会上的表现引起许多闲话。
  • During one of these gatherings a pupil caught stealing. 有一次,其中一名弟子偷窃被抓住。
n.调子;和谐,协调;v.调音,调节,调整
  • He'd written a tune,and played it to us on the piano.他写了一段曲子,并在钢琴上弹给我们听。
  • The boy beat out a tune on a tin can.那男孩在易拉罐上敲出一首曲子。
标签: 万物简史
学英语单词
acetobutylicum
adverse drug events
after - sale service department
akasic
angelism
anorchus
answering machine
antipodists
antipyrino-caffeinum citricum
auto-Transfusion
Axenfeld's test
Bashir
black-on-black
bolometric method
Bolshevize, bolshevized
Burry Inlet
chopper spectrophotometer
clotbusters
combination carrier
complementary MOS integrated circuit
consolatory
critical magnetic flux density
Current Coupon
decline of water table
detonation wave
diareses
direct coupling system
direito
Doppler navigation system
dot speed
eacc
ECE
Edwin Drood
efficiency expert
electron-pair production
ever-handy
fancy for
feigned issue
fjord oceanography
flax dodder
fordist model
full-louvered door
functional assembly
further development
genus batrachosepss
genus Helipterum
group incentive plan
haulered
home-repair
icteric phthisis
indexlink
infidels
international liquidity units
Isocainide
isogredient
Jewified
longitude difference
major conjugate arc
man made satellite
means of fastening
megahenry
Middendorfa, Mys
minister of economic affairs
Morro, R.
NEC necessary
nonvascular organisms
nuculana husamaru
overlay contact
parameter model
pop-up missile
Pulindas
pump surging
relative degree of development
Republic of Finland
Richard Haldane
running set
Rupert
Ruppia maritima
sack trucks
safety colour
sanitoriums
satellite position
seven-card stud
shaped joist
shoot-em-up
singularity line
splittail
step up n.
superintending
supersalts
swine rearing
talipes planus
Tintigny
transprosed
uncollegiate
ungroup
value broker
waive sb off
X-Machine
You never know your luck.
zinc dichromate