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
acid plagioclase
acid-tolerant
acolyte
Anomala
anti-foaming agent
arachnophora fagicola
arginine test
arteriae cervicalis superficialis
ballistic case
Bankia
base stations
bdellins
beam-indexed electrical signal storage tube
block limit
British Institute of Radio Engineers
cagmag
calcined kaolin
Caltavuturo
Camellia petelotii
chicken runs
circumstance
clearance under span
comixing
compoundedly
consumption of petroleum
coxella
dihydroxy naphthlene
Dipentrate
double dotted semibreve
elaio-
electrogenerated chemiluminescence
ethyl cyanamide
euskaltegi
far out
farrandly
fascioscapulohumeral
fenestras of the cochlea
ferro-magnetic excitation
final judgments
finance capitalism
foot pedal pad
frequency-sweep
fritted sand
glafcos
glenfinnans
hydraulic piercing
in the miney
incitatives
inella acicula
infinite dye bath
informal discussion
kassalow
lenograstim
Lessilur-Prirey tests
loewy
long-term creditor
looky here
migration of metallic impurity
millamant
minor fourth
mohwa tree
Moxotó, R.
multi chip module
Murray Fracture Zone
Nannizzia
nonchalantly
nonselective (thermal) excitation
notch sensitivity ratio
paints out
petarade
Petlāwad
polytropic process
preoperculars
Prunus cerasus L.
pulicaris
ragged sailors
range hood
relative seasonal fluctuation
renewed bark
road oil nonasphaltic
schwertmannites
scratching brush
self-contained crash tender
sloppy journalism
splurged
statistical estimate of error
submission of papers
superessives
suspected supernova
telescopic screw
thatta boy
transform of jump function
triphosadenine
triple screw steamer
Troyebratskiy
visibility distortion
Värmskog
wasna
weapon delivery system
will for power
XGAM
zinc accumulator