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
.ans
allosteric agent
analog photogrammetric plotting
ayuda
bell-rope
bettong
bottger
cats people
Chinese black mushroom
cockerels
collapsions
core array
corresponding signal
Cremer
crustiness
diacritical
diesel rock drill
diplococcus pneumoniae miq.
donce
ducket
electronic scram
enterstomy
eslicarbazepine
external pluralism
Fibonacci Fan
flash-over ground relay
flowed head
fuel injection equipment
Fulanga (Fulaga) I.
genning
gpra
hersage
high-density focal plane array
highbush blueberry
hydrazi
in joy
in line with x
ink cell
joggle timber
juice freak
Kirschner test
Lake Spring
Lexan
liferafts
lithol.
low pressure ignition
Loyada
Malekābād
Mariotte's spot
marshlike
McKendrick reaction
Mertz Glacier
microhenry
mine survey
moonlighting
myalgia cervicalis
navigation and guidance
neomethiodal
nicoracetam
non-self adjoint operator
odd trick
onegene oneenzyme hypothesis
pajama checks
parallel algirithm
penalty corners
Perho
planned feedback
Polystoma
post-ferment safe pressure stabilization valve
precipitation cumulus model
protheroe
quarter-finalists
raw yarn
reserve fund account
revolving pair
riser tensioner
Rocourt
rotary mill
rubber-faced track
scherfig
Schwarzschild antenna
semiautomatic defrosting
series and-parallel circuit
Shwartzman reaction
skiffle (england)
Spirillum lipoferum
St-Gilles
standard postlude
thermo-motor
Thermopsamine
thyristor characteristics
tooshes
tree shaped
umlessness
undisclosed factoring
uredo miscanthi-floriduli
variation adjustment
vary colors by slice
wide width wing
wire pressure meter
written out program
Zadetkyi Kyun