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
3-methoxypropyne
acauline
aggregated firm
air trunking
AKL
alacoque
amino-naphthol sulfonic acid
antiquaire
antithetic theory
asoes
azria
batch rectification
Blaengwrach
boujdour (cabo bojador)
bromellite
brongniartine (brochantite)
brumby brumbie
camphorone
celas
closing file
currymaul
distinctive feature matrix
Eastman Kodak Company
easy-to-spot
economic development program
electrolyzer
environmental data base guides
equilibrium of floating bodies
false rejection
filetyping
Fimarbi
fistul(o)-
fones' method
frame driven dialog system
Fuganning
genus keteleerias
genus panicums
go kablooey
guadalperalon
gun down someone
heazelwoodite
herba laminariae
highlevel
historizes
homoconative
housing assembly
inauthentic
inference strategy
interval patition
Ixodidae
Krueger flap
law of reform
look for
materiel handling equipment
meow
MEZ
mixed-ability grouping
mobile billboard
night-service connection
Olpidiaceae
out to win
output buffer
oxalmethyline
palmera
paying-out
Pedro Calderon de la Barca
perlite products
peverly
photographic film plant
platyzosteria nitida
plumbous fluoride
practical factors
precursor gas
preorgastic
Purbeck, Isle of (Pen.)
Quincyte
Rashkovan
reconditioning dimensions
renovates
Resko
respiratory encephalopathy
rose periwinkle
Salobre
self awareness theory
self tap
self-grown stream
slurpability
solder spatter
spherical irradiance
start angle
supremacy clause
switched off
system frequency
Thladiantha cordifolia
three-phase alternating current induction motor
thyphenytoin
time rise
tokenising
TROMEX
two-out-of-three
zendor
zonal diffusion