时间:2019-01-28 作者:英语课 分类:实用英语


英语课

   还记得孙燕姿那首红遍大江南北的《绿光》吗?“翻越过前面山顶、层层白云,绿光在哪里?”——不知道有多少人跟小编一样,以为歌里的“绿光”只是对幸福的比喻。而其实在现实中,“绿光”是真实存在的呢!来看看它的解释吧:


  Green flashes and green rays are optical phenomena 1 that occur shortly after sunset or before sunrise, when a green spot is visible, usually for no more than a second or two, above the sun, or a green ray shoots up from the sunset point。
  The reason for a green flash lies in refraction of light (as in a prism) in the atmosphere: light moves more slowly in the lower, denser 2 air than in the thinner air above, so sunlight rays follow paths that curve slightly, in the same direction as the curvature of the Earth. Higher frequency light (green/blue) curves more than lower frequency light (red/orange), so green/blue rays from the upper limb of the setting sun remain visible after the red rays are obstructed 3 by the curvature of the earth。
  简单说来就是:在日出和日落时,当太阳只有一小部分在水平线之上,而空气又十分清新的话,绿太阳便会出现,维时仅仅数秒。我们知道,太阳光通过大气层时会被折射,正如三棱镜一样,把太阳光的白光折射为彩虹七色。波长较短的光线会被折射得较多,所以在日出或日落的一刻,我们最先或最后所看见的都应该是蓝光。但是,蓝色的光在空气中较易被散射,不易看见,而往往我们看见的,是比蓝光波长稍长的绿光,这便是绿太阳的由来。可是如果空气中有太多灰尘的话,就连绿光也会被散射开,我们就看不见绿太阳了。

n.现象
  • Ade couldn't relate the phenomena with any theory he knew.艾德无法用他所知道的任何理论来解释这种现象。
  • The object of these experiments was to find the connection,if any,between the two phenomena.这些实验的目的就是探索这两种现象之间的联系,如果存在着任何联系的话。
adj. 不易看透的, 密集的, 浓厚的, 愚钝的
  • The denser population necessitates closer consolidation both for internal and external action. 住得日益稠密的居民,对内和对外都不得不更紧密地团结起来。 来自英汉非文学 - 家庭、私有制和国家的起源
  • As Tito entered the neighbourhood of San Martino, he found the throng rather denser. 蒂托走近圣马丁教堂附近一带时,发现人群相当密集。
阻塞( obstruct的过去式和过去分词 ); 堵塞; 阻碍; 阻止
  • Tall trees obstructed his view of the road. 有大树挡着,他看不到道路。
  • The Irish and Bristol Channels were closed or grievously obstructed. 爱尔兰海峡和布里斯托尔海峡或遭受封锁,或受到了严重阻碍。
标签: 绿光
学英语单词
a private member
aclusion
active valency
algorithmic models
angiectopia
ansate fissure
astacin
autobooted
average transinformation rate
band wheel crank screw
bathrooms
Billroth's cords
British Saanen
by stage
Caravaggioesque
carneal
castorseed cake
charles edward berries
closed off
compensatory fiscal theory
compete on an equal footing
conjugate joint system
Convolvulus pandurata
CR (command register)
dark fixation of carbon dioxide
dictyochophytes
dietyl phosphite
direct current regulator
doctrinarianisms
dutch-processed
electro-compressor set
endure for ever
Envendos
extrinsic cicatricial contracture
Faulkton
field supervisor
fiercely-competitive
flash temperature
flat peas
flip-chip I.C
gammarolite
gas-holder oil
high capacity reservoir
hood side upper panel
hydrogen induced absorption peak
hyperhomocystinemia
hypochlorite-orcinol tests
imprest holder
index matching
instruction sets
insurance information
Kalischer's disease
late complication
leariest
lemonlimes
lencophenga (lencophenga) atriventris
live bottom
Llanbedr
losest
major individual investment project
Mandatory Palestine
mck
monoethyl ester
motion control function
mycotic abortion
negative-ion vacancy
non-public information
nurse observation scale for inpatient evaluation
overparameterizations
party-line telephone
pincht
place pressure upon someone
practice test
quasi-harmonic oscillation
re-enrol
recovery subsystem
refined wool fat
returns book inward
rub(bing) stone
saw tooth generator
second in command
seek for
sektyakh (siktyakh)
semiautomates
seriat
session dialogue
sheel
social need
stand on vessel
stretch out view
tailoring process
three-phase full wave rectifier
torsion-pendulum clock
Traian
trichocladium cylindroclavatum
trophyte
tsktsked
unit triangle
urethrovesicolysis
value of wholesale trade
Vimianzo
wastewater-treatment