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
ackte
additive for sulfur capture
apexcardiographic
Bald Knob
Ban Dindeng
block fillet
capability revocation
Carleton College
cast alloy steel
chromium(iii) oxide
clara haskil
consensus
correction of double outlet of right ventricle
correctour
cutting blade
cutting network
desoxyphenobarbital
deviation multiplication
elixir of vitriol
eponine
ex post (facto) forecasting
float operated switch
forced vibration test
frames received in error
frequency number
fuk me
functional international institution
genus Zaglossus
Gibeon
gingivo-axial
go-arounds
gravitational charge
ground clearance of ma-chine
guard boat
Hassi R'mel
high people's procuratorate
high-altitude bombing
highdey
IMCD
inannas
independently distributed random variable
initial value of the random term
inspires
jbk
keatley
key layered structure
KMPS, km.P.s.
Lagopus
linstone
lucidusculine
machine cut tooth
make a butt of
makestrife
mancinus
manual low gear
marine geophysical prospecting
marine target
merchandise advance
Mokolo
Moore, Cape
My godfathers!
normal burden rates
note oscillator
nuclear power torpedo
orthogonal velocity
pagibaximab
pinctadas
pyrotechnic-flare parachute
rents
reorienting
RITTER'S tetanus
Rocheservière
Ruèras
Santorini's concha
Sergei Rachmaninoff
Sharp's the word.
silicone rubber adhesive
smearcase
somersaulting
southern arrow wood
spatial resolution
splashed around
Squires, Mt.
Staff of Aesculapius
swelling of feet
t.p
Temple of Jerusalem
tennislike
third epistel of johns
thrift passenger
thru
to go for a walk
transitional glass
true folding
tube bedplate
under motivation
uniform boundedness theorem
wall slip effect
welding metallurgy
wideland
wildcat scheme
wing-side car