时间:2019-01-22 作者:英语课 分类:英语时差8,16


英语课

 The earth turns on its axis 1 every 24 hours-or so we’re taught. But, before we had pictures from space, how would we prove it to someone? The rising and setting of the sun and stars in the sky provide pretty strong evidence, but not absolute proof, since they could be moving and the earth standing 2 still! One piece of evidence from right here on the ground is the behavior of falling objects. Newton’s laws of gravity and motion predict that a dropped object on a rotating earth should fall slightly toward the east as it drops. Here’s why. Suppose you have a ball suspended from the top of a tower. Because the earth turns, the top of the tower travels just a little faster, in terms of miles per hour, than the ground directly below, just like the edge of a phonograph record travels faster than a point near the center.


 

n.轴,轴线,中心线;坐标轴,基准线
  • The earth's axis is the line between the North and South Poles.地轴是南北极之间的线。
  • The axis of a circle is its diameter.圆的轴线是其直径。
n.持续,地位;adj.永久的,不动的,直立的,不流动的
  • After the earthquake only a few houses were left standing.地震过后只有几幢房屋还立着。
  • They're standing out against any change in the law.他们坚决反对对法律做任何修改。
学英语单词
8-hydroxyquinoline(oxine)
allotropical
alumina zirconate fibre reinforcement
ambocyte
amount of foreign exchange overbought
anglepoise lamp
animeverses
back course
bailout
barterable
Bataguacu
bismuth hydroxynitrate
boiler control
breeding place
brondbies
callable shares
car-tools
casassa
catechetical instruction
chopped beam method
close of financial year
codonanthum
collective rotation
compressed solar wind
concrete placement
contractual saving
corner grocery
corpus albicans
corrego do ouro
cotton lamp wicks
creep grazing
ctDNA
curvilineal drawing die
date of approval by senate
dealkylation catalyst
direct manure
document cabinet
doillon
enter into an engagement with
Eurya cuneata
forged and welded vessel
free from ship
freight to collect
geebung
grease gelling
Great Firewall of China
groser
gynecological physiology
hobo camps
implicated
iniforis poecila
intermediate valve
kennes
Lantana camara
like a bad halfpenny
malstrom
marine pollution in special form
Martiniquan, Martinican
mechanical flotation machine
mohsin
Muslimology
Nadezhdino
no-buffer queue
ogdohedra
oheloberries
oxidation rule
parallel spin
pass sentence upon sb
peeled resurfacing
penalty schedule
perform a study
pinching agent
plasmature
plotter step size
radiotelegraph room
radowitz
raston
rate control
reflected value
regional navigation(rnav)
relational structure record
runaway reaction
sassarara
skate through
south-african ruby (cape ruby)
squailing
standard vertical-tubes evaporator
survey and geological exploration
tak
tetraconta-
the dawn
to size
treehugger
trinity rivers
truncated icosahedra
tubal ligations
v.o
vacuum induction
verification process
visual synthesis of colour
Web site
Yandeba