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
abandoned instigation
acryloyl chloride
aristocats
auditee
axiom of incidence
be interred
bone marrow derived cell
Brigitte Bardot
bulk handling
butylcarboxylic acid
common ram
con sidering
cost of living insurance
cranched
defective nutrition
delions
Dexol
disquietation
dryscape
Eggebek
enamel wire
enchantments
f.r.c.
ferrite core
Ferronicum
flash band
flat photoelectric crystal
folding camera
garabedian
gear efficiency
genus phytophthoras
geranene
ideational replacement
ific synthesis
IgAs
imaginary hitch point
inpermixt
Intel Single Board Computer Intel
j.b.s
Jekyll and Hydes
karyokinesis
Khodyashevo
lamp socket
left arrow
letin
lines of equipmential
lomartire
lumped element
magnitude statistics
manless coal face
McCarron
metapodialia
monetary unit
multiple pin plugs
muscular mcsoropter
mxico
natural drainage system
nitra-lamp
non comparable data
non-delivery forward
ostrova
patty-pan
peribursai
phenotypic flexbility (thoday 1953)
photocamer
photohydrogen
pipiens
PPD of Mycobacterium intracellulare
practical effect
prerouting
public-
quality of management
r/u which date/time qualifier
reinforced concrete spiral casing
required signal
reserve management
rotational spectrum
Sabouce
scale-up problem
segara
Serere
skew wire line
slack coal
suburothelial
surplus receipts
survey motor boat
tamponing
temporary boarded fence
terex
thermal-jet piercing drilling
three dimensional lattice
three-year-old horse
tin wire
two-hundredth
vadose
vaticani
vice chairman, vice-chairmen
welding jaw
woody plant tissure
work with
xenoblast