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
acetyl-
Ado-Tymovo
alkali scrubber
ambrosia fungi
antisexualist
arteriae hepatica propria
bare assembly
barnstorms
bekenstein
Bellatan I.
beta-blockade
brittle body
cardiovascular radiology
cartes du jour
close capture file
comoro i. (grande comore)
compile-directing routine
continuous aerosol detector
damage fault
day sleep
decays
declare option
digital sort
dogweary
dortory
dynamic disk
EOS (electro-optical system)
erythravine
evolution of
exchange current density
exoglycosidase
fault detection algorithm
five orders
flash thickness
flying test bed
graft polymer latex
grained layer
greither
guidanuce information
hasik
headlines
heart channel of hand-Shaoyin
heterojunction photocathode
hounds
Ignacio Canyon
irrigate
Kamchukchee
Katmai National Park and Preserve
knees together spring sitting
KUCA (Kyoto University Critical Assembly)
laxxer
Lithocarpus mairei
lobolo
loosenesses
manager's discretionary limits
mat coating
meadowsweets
megalohepatia
Morton, Jelly Roll
mthode
multi-station machine
n. occipitalis minor
neffatis
net present value of income from investment
network termination 2 (nt2)
neutral-point solid ground
numerical weather forecast
o-methyl thiocarbamate
parental diatype
parenty
pick apart
pillansii
plc program
pneumatic engraving tool
pudu mephistophiles
put it across
quasi legislative
radiation superheater
resistance gradient
roll call polling
rouilles
rue the day
screen wall counter
sky lanterns
still wave bending moment
stimpart
streak inoculation
sureos
swamp hickory
tape facsimile
teichopsia
telosmoside
tertiaries
throw-over wheel
Toloa
training algorithm
truck weighing scale
tuberculoser vaccine
uncalled shares
visceral furrow
w band
working cam curve