时间:2019-01-10 作者:英语课 分类:与美国小学生一起学英文第10册


英语课

   Prisms 棱镜


  Why can we see rainbows after rain? 我们雨后为什么能看到彩虹?
  We can see rainbows after rain because droplets 1 of moisture in the air work like a big prism. 这是因为空气中的水滴就像一个大棱镜。
  So what is a prism? 那么什么是棱镜呢?
  It is a piece of glass. It usually has a triangular 2 shape. 它是一块玻璃,通常有三角。
  What does the prism do? 棱镜的作用是什么?
  It reflects and separates light. 它能反射和分散光线。
  When we look at sunlight, it seems white. 我们看阳光时,它似乎是白色的。
  However, if you see sunlight through a prism,  但如果你透过棱镜看到阳光的话,
  you'll know that there are different colours from red to violet in the white light, just like a rainbow. 你就会知道,白光中有不同的颜色,从红到紫,就像彩虹一样。
  Because of prisms, we know that sunlight is a mixture of different colours. 因为棱镜,我们知道太阳光是不同颜色的混合物。

n.小滴( droplet的名词复数 )
  • Droplets of sweat were welling up on his forehead. 他额头上冒出了滴滴汗珠。 来自辞典例句
  • In constrast, exhaled smoke contains relatively large water droplets and appears white. 相反,从人嘴里呼出的烟则包含相当大的水滴,所以呈白色。 来自辞典例句
adj.三角(形)的,三者间的
  • It's more or less triangular plot of land.这块地略成三角形。
  • One particular triangular relationship became the model of Simone's first novel.一段特殊的三角关系成了西蒙娜第一本小说的原型。
标签: 小学英语
学英语单词
acrospiromas
analytic operator-valued function
area levelling
atomic oxygen fluence model
axial cut distance
azimuth compiler
bahorok
ballast draft condition
batch calculation
bellowed
causative factors of injury
cepalotribe
cobalt nitrate
commodity in warehouse
companion piece
completion message
concentration tracer
cu fts
despotic monarch
dextropropoxyphene
doubling course
dwarf grey willows
elbow-bone
ewan mcgregor
fakeness
flat-plate pressing machine
foot piece
free open textured sand
friction bezel ring
game-fishing
hecto-coulombs
henders
heterogenous catalysis
hog-nosed snake
hollow cathode aluminum ion laser
horsemeat
hungers
hydrophiling
ill-luck
in boundless enthusiasm
incident neutron energy
Indigosol Green IB
iner
katastates
keep your chin up
lavand
load-carrying winding
low-volume shipper
Macquarie Island
magson
Maskil
mason cities
master distance indicator
MCAIS
measurement pattern
mene, mene, tekel, upharsin
metasilicate
more significant bit
Murray State University
new productive capacity
nonoperating
numerical response
optimum capital stock
pachycholia
paramilitarisms
paratrygonica
pentapyrrolidinium
phobic layer
phrasemakings
pinos
power weight ratio
prolified
rageaholics
ravet
reactive termination
redirector
retrofittable
rookly
rotundatus
rugous
satyr plays
sea-cornet
Seckels
single-tub wagon tipper
special holder
spironolactone(anti-aldosterone)
spitball
standard money unit of account
state of permanent neutrality
statistic bit rate
steel hemp
suck at
suratenses
to service
tweer
underground gasification of coal
urcaryote
variable-duration
water regeneration technique
whip a fault out of sb.
wormly
yellowishness