时间:2018-12-30 作者:英语课 分类:考研背诵50篇


英语课

   A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Sun's very center. It is here that is to be found the source of the energy that the Sun constantly pours out into space as light and heat. This energy is librated at the center of the Sun as billions upon billions of nuclei 1 of hydrogen atoms collide with each other and fuse together to form nuclei of helium, and in doing so, release some of the energy that is stored in the nuclei of atoms. The output of light and heat of the Sun requires that some 600 million tons of hydrogen be converted into helium in the Sun every second. This the Sun has been doing for several thousands of millions of year.


 
  The nuclear energy is released at the Sun's center as high-energy gamma radiation, a form of electromagnetic radiation like light and radio waves, only of very much shorter wavelength 2. This gamma radiation is absorbed by atoms inside the Sun to be reemitted at slightly longer wavelengths 3. This radiation , in its turn is absorbed and reemitted. As the energy filters through the layers of the solar interior, it passes through the X-ray part of the spectrum 4 eventually becoming light. At this stage, it has reached what we call the solar surface, and can escape into space without being absorbed further by solar atoms. A very small fraction of the Sun's light and heat is emitted in such directions that after passing unhindered through interplanetary space, it hits the Earth.

n.核
  • To free electrons, something has to make them whirl fast enough to break away from their nuclei. 为了释放电子,必须使电子高速旋转而足以摆脱原子核的束缚。
  • Energy is released by the fission of atomic nuclei. 能量是由原子核分裂释放出来的。
n.波长
  • The authorities were unable to jam this wavelength.当局无法干扰这一波长。
  • Radio One has broadcast on this wavelength for years.广播1台已经用这个波长广播多年了。
n.波长( wavelength的名词复数 );具有相同的/不同的思路;合拍;不合拍
  • I find him difficult to talk to—we're on completely different wavelengths. 我没法和他谈话,因为我们俩完全不对路。 来自《简明英汉词典》
  • Sunlight consists of different wavelengths of radiation. 阳光由几种不同波长的射线组成。 来自辞典例句
n.谱,光谱,频谱;范围,幅度,系列
  • This is a kind of atomic spectrum.这是一种原子光谱。
  • We have known much of the constitution of the solar spectrum.关于太阳光谱的构成,我们已了解不少。
学英语单词
a carreira
acid attack
air-glass reflection
aldosterone deficiency
amaxophobia
amount carried over
asynchronous logic
automatic meter reading system
bankrupt
barter agreement
battery ore
be weak on
bishopess
burnishing surface
caryophyllenol
CHBHA
civil-war
CM8222
Cobury bread
cognitive limits
coitus int.erruptus
common platform
decimal scale
diphosphorus
disintegration chain
displacement ferroelectrics
drum polletizing
dtb
ectopia lentis
eissero
enter into conversation with
F.I.A.S.
fecundly
fixed sash
fizzlings
freelore
fuster
gelisolifluction
ground-basses
Harrison 2, Benjamin
hole reaming
hop residue
Hornstorf
Hydrangea shaochingii
in-statest
indirect-measurement
inner reflector
interleukine
intra-atomic energy
Irish Republic
Jaggarnat
lactosylceramides
laminae spiralis secundaria
Lexus lane
Lindera limprichtii
lineo-normal distribution
Macht metal
mendication
mizuage
monodactyl
Morellin
multilepis
narcisms
nasal splint
Nemipterus
noelani
noiseuses
non-stimulated
not busy interrupt
oil pressure unit
Opie paradox
orthomitosis
pack-up kits
perspective projection
preheating process
quarternary alloy
radio resource control
refreshable
rockfill breakwater
scavenge trunk
set much by someone
shared main storage
sheafer
single loop servomechanism
Soranus
stylistic component
Syväri
Szarvas
tectomorphic texture
tettigoniid
thiodan
Thymus nervulosus
totalizing
toxicological detection
transport mean-free path
unflappability
unven
vibrating-reed amplifier
vinous tincture
Västernorrlands Län
well-behaved net
wood spurge