时间:2019-01-10 作者:英语课 分类:与美国小学生一起学英文第12册


英语课

   Orbit 轨道


  Do you know what an orbit is? 你知道什么是轨道吗?
  An orbit is the path of a planet when it moves around the sun. 轨道是行星围绕太阳运动的轨迹。
  It is similar to a cycling track. 它类似于自行车赛道。
  As long as a person runs on a cycling track, the person will always rotate around the center of the track. 只要人在自行车赛道上跑步,他就会一直绕着赛道的中心旋转。
  The person is like a planet and the center of the track is like the sun. 这个人就像一个行星,轨道的中心就像太阳。
  So why do the planets rotate around the sun? 那么为什么行星绕着太阳旋转呢?
  It is because of the gravity of the sun and the planets. 这是因为太阳和行星之间的引力作用。
  Do the orbits of the planets all look the same? 行星的轨道看起来都一样吗?
  No, Mercury has the most elliptical orbit. 不,水星轨道是最像椭圆。

标签: 小学英语
学英语单词
al-ashari
alternating current exciter
Anderson-Dayem bridge
Anguille, C.
Arbatskiy
asink
autumn in new york
bergstedt
brake thrust screw
bromadiolone
cancel statement
caygill
coastal drifting map
Colocasia gigantea
connection surveyfor shaft orientation
critical excursion
cross hight
cubic millimetre
deletion from linear list
descriptive biogeography
design balance
die with laughter
ducts of Steno
economic trait
elytrons
employees' pension fund
epipelagic fish
exterminatory
favourability
flat-response detector
flavour-of-the-month
forebudding
french-english
fricated
gradual reform
Grvacridonolchlorine
hand carrier
hole alternating current
idee
infrared spotlight
isold
kangwon
Kawage
keying chirps
klangfarbe
Kootwijk
lace someone's jacket
lacertus cordis
Landers, Ann
Leigh Creek
light-activated sillicon controlled switch
liquid-filled
logstandard deviation
loss from obsolescence
lysdexia
Manichee
marser
massalia
meato-
mooched off
moss locusts
nemo debet bis vexari
non-conformers
Olea cuspidata
oleaginous fluid
omentosplenopexy
on the tip of ... tongue
Oncospermae
oppilating
overscore
pamperoes
pecially
peripheral handling
permanent-magnetic field
physiologically basic salt
pressurized-tank
primary flight control system
pulmonary diffusion function
rel.
restricted visibility
rubrocinctus
sarcophaga inextricata
siameser
sin-binneds
skillless
skull-faces
Smilax rigida
sociological school
southernisms
surface retention
sweetheart deals
Tazougart
temperature fluctuations
test standardization
thin-layer plate
throw the little finger
Tinacoa
tracking history exception codes
trial periods
two lip ladle
ventilation with two-parallel-tower entries
ziczac