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
3-hydroxyisobutyryl-CoA
abbreviatedly
airplays
alcoholic dementia
amount of ozone leak
archaeologists
at his leisure
automatic cycle
Babouvist
biki
bothrion
breschet's bone
built - up area
bus oriented backplane
cataclysmic variable
cause a stir
chord of the augmented sixth and fifth
clots
common buzzards
Curie, Pierre
cyclic life
deserve a corner
dhang ra.
distocia
division name
eccentric feed
ecodevelopments
engage in
equity investor
Fermat's spiral
fertility policy
figli
Fimbristylis chinensis
fissura prima
flower-painting
Fly River
fresh election
hands-in
high-energy impact pressing
hydrogen probe
import-competing
Karacakιlavuz
kernel processor
Klasea
labouratory
landfowl
leis-
Lepironia articulata
machine translation summit
marine hydraulic control balance valves
mass production trial
military transportation service
mixing lacquers
moonlikest
mucor microsporus
multivariate t-distribution
neomineralization
night hag
nomen confusum
outdoor design temperature for heating
Painful Experience
pale shade
Panel Bank
pantofle, pantoffle
phosphogalactouridyl transferase
pile us
piron
planetquest
Poisson density functions
Pollāchi
Processus palstinus
pseudophotoaffinity
r value
rare-metal couple
reshts
resorption border
rheumatism with the blood vessels involved
south sea jasmine
speakership
specilize
test vessel
thretteen
toad hall
track chart indicator
trichloromethane sulfonyl chloride
tripartism
trippin' out
tuberous tumors
tumefaction of lava
tunnel photographing car
tutwork
tv programming
underground nuclear power plant
undyed fuel
vannessa
video reverse
Villeneuve-d'Allier
wastewater characterization
waterlogging-hydromorphic horizon
weapon monitoring center
zygomaticoorbital foramen