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
actual thermal efficiency
Ahlen
amino-acid
anti-tone mapping
antithrust bearing
archduke
at the coalface
ATP-2Na
banged up
Bobaomby, Tanjon'a
boggle at
brickety-brack
byerley
cabin hook
calf meal
CBMMP
charged latent image
co-riparian
conjugate defect
corynebacterium sepedonicum (spiek . et kotth. skap et bunk )
Crocco-type nozzle
cubic holohedral
current deposit account
diffend
diphosphorous trisulfide
double reflection
dredging fleet
dual-directional coupled
dual-mineral model
employee-owners
energy-sapping
Fiac
five-pick terry
forest on land liable to inundation
Frangenheim
full wafer
geometric multiplication
grate fired furnace
gravitational astronomy
greasy blockage
idler arm
impulse coupling
informalized
insoluble tannal
institutional fund
integral-action time constant
Lignac
log ship
magnetic cleaning equipment
mailgrams
Mato Grosso do Sul
mesenterium
mill saw
mizen-topgallant
montigny
mowar
nail-brushes
non-spinning motion
nonmonoclonal
open-loop series circuit
oxidizings
perfectionating
permalancer
Philip The Evangelist, Saint
photo exposure machine
pomponius
possible illegle act
potentilla leuconota d.don
pre-acquisitions
quinkle
radicchios
rankle
reinforcement ratio
Relyovo(Rel'ovo)
remobilised
Saussurea malitiosa
screen settling
scuffing grind
seeping
semi-microanalysis
skew table roll
son of the dragon
spiegeleisen
square root-floating
statutory inventory
stepstone
suture schmieden
tear sth pieces
telecommunication terminal
tencels
tongue sandwich
trts route map
true counting rate
unproductive property
up-and-coming star
Usutu
vector state algorithm
vena cystica
Waldenstrom
wrapper rolls
wreathlike
yanky