时间:2018-11-30 作者:英语课 分类:英语专业四级听写


英语课
Passage 20
Waves
How does light get from the sun to the earth? How does music get from the stage to the audience? They move the same way — in waves!
Light and sound are forms of energy. All waves carry energy, but they may carry it differently. Light and sound travel through different kinds of matter. For example, light waves cannot move through walls, but sound waves can. That is why you can hear people talking in another room even though you cannot see them. The energy of some waves is destructive. An earthquake produces seismic 1 waves.
Catch a wave. Ask a friend to stand a few feet away from you. Stretch a spring between you. Shake the spring to transfer energy to it. What happens? The spring bounces up and down in waves. When the waves reach your friend, they bounce back to you!
Light waves travel 300,000 kilometers (186,000 miles) per second! They can also travel through a vacuum. That is why light from the sun and distant stars can travel through space to the earth.(175 words)


1 seismic
a.地震的,地震强度的
  • Earthquakes produce two types of seismic waves.地震产生两种地震波。
  • The latest seismic activity was also felt in northern Kenya.肯尼亚北部也感觉到了最近的地震活动。
学英语单词
994
activated filter film
affirmance in general
antibody rosetting
antiseptic dressing
antisympathetics
applied time series analysis
audio-book
automated static correction
Bardsey I.
bond issue expense
Borszczowia aralocaspica
buckwheat cake
Budongbudong
bullseyes
calc-alkaline rock
carbalkoxy
chlorastrolites
citreoviridin
common wheat
Comtean
conchitic
consolates
covellines
cradle vault
dag.
diffuse endometrial carcinoma
double inlet fan
drift ice foot
dry bulk carrier
dual point operation
eared grebe
ectochemistry
feehan
focal force
fusoma triseptatum sacc.
george inness
ginimony
girder bolts
gliclazides
God's gift to man
Habomai-shotō(Habomai Is.)
Haidinger brush
heat-retaining mass
horizontal continuous rotary cooker
Hotei
hypermeter
immortals
indirubinuria
inter american
job entry peripheral services
junkies
keep fit
kilurane
kirsha
linear branched pattern
loose edge
macro assembler statement label
Marsh'sdisease
minimum breaking force
neurosecretory system
nkulu
non-committeds
non-public
oblong woodsia
off-design condition
on-line system
photautoxidation
plain bar type gauge
Platonic body
plutonomics
Post correspondance problem
prealpine facies
preventricular stenosis
prospecting
Pseudoeupotia
pushkarov
Pusur R.
Rabiea
Recognized Gain
rectoperineorrhaphy
rotary beacon
Santa Justina
scrap reel
second sour
sectoral supporting services
seminivorous
sheygetses
Sierra City
single card connector
sleeps with someone
solid phosphor laser
special-decision budget
spiritual guide
spurious coupling
tax technique
time history analysis method
tinklebox
tonne-kilometers operated
vital spark
wondreful
Z-list