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
4-bromotoluene
absence regulation
abstract impressionism
academese
allyl rhodanate
AOM (analog output module)
Apache
arbitral court
arghs
asphodels
associated model
Astroloft
auxiliary member
average size of family
baked product
barbotines
beam weigher
bird poop
bounded estimator method
cash service
corase meal
criminal knowledge
crystal conglomerate
customal
cylinder-cooling fin
dendrobenthamia japonica fang var. chinensis fang
deparaffined
development of evils in febrile disease
disaggregated classification
divided into
doubloon
dramata
eagleship
feed water space
fire-extinguishing bullet
Fleet Marine Force
Forest of Arden
fossae submaxillaris
four-compartment mill
gasification degree
general equilibrium
gravity feed circulating system
grounding contact
guiseppe
health care financing administration
ice needle
individualise
inlay camera
input reference
ir augmenter
jeebers
jtc1/sc24
lake saint clairs
lignaloes
m-c
make ... contribution to
manufacturer's agency
Methylisooctenylamine
miraging
mnchhausen
myositis ossificans circumscripta
negative information
o.r.c.
Oyo State
pentaplicates
pessimal stimulation
picaresque novel
pit pairs
Polygala lacei
porcelain mask
portcrayon
poudre de riz
preuss
preview gain
product dislocation
reconsented
republics of mauritius
roofing hammer
Rules for the Construction of Sea-going Steel Ships
Ruston
Rutherfordian
Salanthyl
Salemites
Sand I.
sasine
secondary bending
serological defined antigen
single-contact
sissile dislocation
speed limits
spoonless
stable frame
supported along four sides
take ... advice
Teherani
the first priority
threatscapes
transit beacons
trouble shooting functional module
ts/tg card
washrack
Winnipeg Commodities Exchange