时间:2018-12-04 作者:英语课 分类:考研背诵50篇


英语课

 In science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A good example of this is found in the kinetic 1 molecular 2 theory, in which gases are pictured as being made up of many small particles that are in constant motion.


 


A useful theory, in addition to explaining past observations, helps to predict events that have not as yet been observed. After a theory has been publicized, scientists design experiments to test the theory. If observations confirm the scientist’s predictions, the theory is supported. If observations do not confirm the predictions, the scientists must search further. There may be a fault in the experiment, or the theory may have to be revised or rejected.


 


Science involves imagination and creative thinking as well as collecting information and performing experiments. Facts by themselves are not science. As the mathematician 3 Jules Henri Poincare said, “Science is built with facts just as a house is built with bricks, but a collection of facts cannot be called science any more than a pile of bricks can be called a house.”


 


 


Most scientists start an investigation 4 by finding out what other scientists have learned about a particular problem. After known facts have been gathered, the scientist comes to the part of the investigation that requires considerable imagination. Possible solutions to the problem are formulated 5. These possible solutions are called hypotheses.


 


In a way, any hypothesis is a leap into the unknown. It extends the scientist’s thinking beyond the known facts. The scientist plans experiments, performs calculations, and makes observations to test hypotheses. Without hypothesis, further investigation lacks purpose and direction. When hypotheses are confirmed, they are incorporated into theories.


 



1 kinetic
adj.运动的;动力学的
  • There exist many sources of energy both potential and kinetic.存在着许多势能和动能的能源。
  • The kinetic theory of gases is the best known example.气体动力学理论就是最有名的例子。
2 molecular
adj.分子的;克分子的
  • The research will provide direct insight into molecular mechanisms.这项研究将使人能够直接地了解分子的机理。
  • For the pressure to become zero, molecular bombardment must cease.当压强趋近于零时,分子的碰撞就停止了。
3 mathematician
n.数学家
  • The man with his back to the camera is a mathematician.背对着照相机的人是位数学家。
  • The mathematician analyzed his figures again.这位数学家再次分析研究了他的这些数字。
4 investigation
n.调查,调查研究
  • In an investigation,a new fact became known, which told against him.在调查中新发现了一件对他不利的事实。
  • He drew the conclusion by building on his own investigation.他根据自己的调查研究作出结论。
5 formulated
v.构想出( formulate的过去式和过去分词 );规划;确切地阐述;用公式表示
  • He claims that the writer never consciously formulated his own theoretical position. 他声称该作家从未有意识地阐明他自己的理论见解。 来自《简明英汉词典》
  • This idea can be formulated in two different ways. 这个意思可以有两种说法。 来自《现代汉英综合大词典》
学英语单词
adverse weather condition
afterburn
ammonium imines
amphidrome
aptocholecystectomy
as drunk as an owl
basualdo
biscogniauxia formosana
blockheadisms
bring it on!
British Export Board
by the log
Cassia acutifolia
circular economy
core exit pressure
deposition sedimentation
destination task
direct viewingtype
direction of deviation
do justice to a dinner
Dulong and Petit's rule
electrostatic displacemen
ellipticity angle
estrategia
falcn
flow value
furnace atmosphere
future public land mobile telecommunications systems
glacier lake
govanianum
Granadilla foetida
Hematol
high speed plough
Huazhong
huyr
hybrid watch
impeller seals
intensity modulation scan
intrinsic redshift
Jhunjhunu
Lalimbuë(Lalimboee)
leaf tree
Leonurus heterophllus
long - term performance
look on the dark side of things
lundahl
make a victim of
medium grained
Michaelmastide
monoballism
n-max
neurocoeles
non-adiabatic rectification
normal spectral measure space
note for growth habit
numerical reservoir model
nyberg
of little worth
one-dimensional disorder
oxygen ratio
pandemic planning
Penapolis
phase of crystallization
pleurosigma strigosum
politican
postmortem wound
primordians
pristipomoides typus
protentomon
purchasing-manager
radial stay
randomized complete-block design
reiterative
rubus peltatus maxim.
saccoes
sales received in advance
satellite electronic countermeasures system
ship integrated power system
shoot range
soft-server
sopas
spermine
ST_moving-up-or-down_up-and-upward
stage party
stargazy pies
start on
stinky pinky
subcritical reactivity
tax on sales and turnover
touch-screen terminal
treasurydirect.gov
ultraviolet microspectrometry
unfutured
uninterruptible
unremembers
vareniki
Verrucomorpha
very low-density lipoprotein
warve
whole body autoradiograpy
yanbaru