时间:2019-01-22 作者:英语课 分类:英语时差8,16


英语课

 In general when we refer to a theory we mean something that's not proven yet. In science it's different, as Yael and Don discuss in this Moment of Science.   Y: Today, on "A Moment of Science," we clear up the difference between a scientific theory and a scientific law.


D: Let me guess. You're talking about that argument that if the theory of evolution were true, it would actually be a law.
Y: Yes--I'm tired of hearing people argue that the fact that evolution is a theory means that modern science itself isn't convinced it really happens.
D: Yeah, me too.
Y: And that's why I thought it's worth going over the terminology 1 one more time.
D: Well, the definition of a law is easy. It's a description--usually mathematical--of some aspect of the natural world.
Y: Like gravity.
D: Exactly. The law of gravity describes and quantifies the attraction between two objects. But the law of gravity doesn't explain what gravity is or why it might work in this way. That's because that kind of explanation falls into the realm of theory. And the theory that explains gravity is the theory of general relativity.
Y: Right. According to the National Academy of Sciences, a scientific theory is a "well- substantiated 2 explanation of some aspect of the natural world that can incorporate facts, laws, inferences, and tested hypotheses." In other words, all scientific theories are supported by evidence, and you can test them, and--most importantly--you can use them to make predictions.
D: So based on that definition, theories never change into laws, no matter how much evidence out there supports them. Formulating 3 theories, in fact, is the end goal of science.
Y: So to say evolution is just a theory is actually an argument for it and not against it. You can't do any better in science than to be a theory. 

n.术语;专有名词
  • He particularly criticized the terminology in the document.他特别批评了文件中使用的术语。
  • The article uses rather specialized musical terminology.这篇文章用了相当专业的音乐术语。
v.用事实支持(某主张、说法等),证明,证实( substantiate的过去式和过去分词 )
  • The results of the tests substantiated his claims. 这些检验的结果证实了他的说法。
  • The statement has never been substantiated. 这一陈述从未得到证实。 来自《现代汉英综合大词典》
v.构想出( formulate的现在分词 );规划;确切地阐述;用公式表示
  • At present, the Chinese government is formulating nationwide regulations on the control of such chemicals. 目前,中国政府正在制定全国性的易制毒化学品管理条例。 来自汉英非文学 - 白皮书
  • Because of this, the U.S. has taken further steps in formulating the \"Magellan\" programme. 为此,美国又进一步制定了“麦哲伦”计划。 来自百科语句
学英语单词
active recovery
adoretus polyacanthus
asphyxia solaris
automatic line following gas cutter
auxiliary element
avelonge
battement fondu
bembeneks
besot
blood-staunching
by intention
C parity
co-developer
colo(u)r negative
complement fixing antibodies
connecting tissue
Consett
cored dendritic morphology
cranial sympathetic system
crustal vertical displacement
day-book
derivative file
DipIT
double differectial
eight bit character
Elkinsia
exhaust pipe
fine control rod
front-wheel steer scraper
fume removal unit
fundamentalss
glossopalatine nerve
GO-fining and RESID-fining
gross savings
gynogenesis technique
H.H.T.
hang on for dear life
heteroepitaxial optical waveguide
intercalated texture
intorsion
intrudest
Japanese Institute of Electrical Engineers
Kru Kru
land-use classes
legal requirement on deposit
makesi
mega-cds
monarchize
moravsky
multi-vendor
multicavity magnetron
nervi suralis
Nordic Council
on job lab
Once in Royal David's City
one's native heath
ophthalmomyiasis
outhaul winch
overexfoliates
PCNL
penetration freezing
photondensitometry
phyletic extinction
polytomoencephelography
Pravdan
pre-existence
preliming tank
Quiterajo
regular singular point
retinal cells
retort peeler
right end
roble beech
rubber tile
secondary table
selen-tellurjum
semi finished screw
semi-dull
service dress
shifters
shut the door on
single-rotor swing-hammer crusher
snap head machine screw
spawn eater
statistics of consumption expenditures
stoichiometric quantity
sucipto
sulfite fermentation
summon aunties
superconducting computer
suspension firing equipment
swear out a warrant
teramachia tibiaeformis
two-address code
udotea conglutinata (sol.)lamx.
unfavo(u)red
unowned property
venae jugularis interna
virgadamo
wire sounding
worldsheets