时间:2019-01-10 作者:英语课 分类:与美国小学生一起学英文第9册


英语课

   Diameter 1 直径


  A diameter is a straight line inside a circle. 直径是圆内的直线。
  Can any straight line in a circle be a diameter? 圆内的任何直线都是直径吗?
  No, its two ends must meet at two different points on the circle. 不是,直线的两端必须连在圆内的不同点上。
  And the half point of the diameter should be the center of the circle. 而且直径的中心是圆心
  Why do we need to know about diameters 2? 为什么我们需要了解直径?
  Because they are very useful when you draw a circle. 因为你画圆的时候,直径就非常有用。
  Draw a circle that has a diameter of five centermeters. 画一个直径为五厘米的圆。
  And ask your friend to draw a circle that has the same diameter. 并请你的朋友也画一个直径相同的圆。
  Then compare the two circles. 然后对比一下这两个圆。
  Don't they look exactly the same? 它俩是不是一模一样啊?

n.直径
  • The circle has a diameter of 6 inches.这个圆直径六英寸。
  • A diameter passes through the center of a circle.直径从圆心穿过。
n.直径( diameter的名词复数 );放大率
  • Any two diameters of a circle intersect each other. 圆周内两直径必相交。 来自《现代汉英综合大词典》
  • This microscope magnifies 40 diameters. 这台显微镜能放大40倍。 来自《简明英汉词典》
标签: 小学英语
学英语单词
adenosis of breast
adherend failure
air circuit resistance
air impermeability test
all my life
alternate reality game
anacara (greece)
arcuated construction
assignee in bankruptcy
Auerstedt
Biafra, B.of
biosafe
bras
butyrobetaine
Cadibarrawirracanna, L.
Canteras
carrier's lien
cephalocaudal axis
combinability
comedy-drama
consolidated profit and loss
conyrine
cre
creep stress
Defloration(Surgical)
delormes
dimension lone
dimmish
dioxydichloride
drosses
educational awareness
efficiency of borehole
efter-
ethanoyl radical
excision of ear
firewagon
free radical lifetime
generative rule
genus Batrachoseps
george orson welless
go the whole coon
Gossau
hand horse clipper
heronswood
hoist over-wind device
horizontal oscillator tube
incrementation by one
joining variable
jurisdictional sea
laryngological
Li T'ieh-kuai
life float
liquid phase high pressure chemistry
Locris
loenge
made preparations
median band
mixture specifications
neurofibrae efferentes
niotha semisulcata
non-destructive test by rebound hammer
oligotrophic region
oxalate protective film
particular average adjustment
peonin
percentage modulation
petrosky
phosphoenoloxaloacetic acid
point geometry
Porto-Vecchio
post fermentation
pretreatment of fiber
profit after tax
prorogues
puppy-eyes
ram-type pump
regional markets
regulations speed
runaria taiwana
satellite earth antenna for household use
selgovae
Songzuo
standard regional route transmitting frequencies (rut)
starch gel electrophoresis
subject classification table
tear shell
teetotums
television frame frequency
terebra affinis
thero-
to play a joke
trichinelliasis
tritet
unedges
unreedified
up and down rod
verge to
vitrages
wallwalks
Wanner's pyrometer
workload characterization
zeroth moment