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
abrasion resistant finish
air-launched rocket
allatrate
angled blade ear knife
architectural scale
automatic check and readyness equipment
capsule of Chinese caterpillar fungus
cash instruments
chabertias
chain exhaust box
Chipera
clinical efficacy (axis)
close-grained pig iron
cordovez
crossplot
cyberracism
dimethylarsenic trichloride
double catenary suspension
dream work
dynamometery
ecteinascidin 743
eluvial placer
facsimile broadcast station
financial and moneytary crisis
fix position
foist one's company on someone
follow on
foudroyant
four flute taper shank core drill
fulgence
Gaoligongshania
Gualda
harakiri
have a good head on one's shoulders
heart-melting
herbaries
himachalol
Hooker diaphragm cell
hoop pines
hot whisky
hydraulic hitch system with unloading function
hypophthalmichthys molitrix
in the wilderness
innovation
inspection process
Kinlochleven
layaway sales
loading
lynsky
Marteilia
Marzuq
medicotechnical
melassicacid
mixed uptrend
moscow' onarimon
multiple voting
mutual restraint
non-functional requirement
noncommutative unique factorization
NPCF
olfactomedin
ooze calf
organic sulfur compound
palaeospecies
perindoprils
pertical
pseudomelanosis
psycosin
QRS-complex
rasping-sucking type
reb
reference list
reject refining
replacement cost basis
rhodocytin
rose-hill
round robin
Saho-Afar languages
secundine
semi-god
servoanalyzer
side stroke swimming
Sinobambusa kunishii
spinoff
St-Henry
stalagmometers
steep gradient
stop to do
Svanninge
systems philosophy
taiwanaspidiotus shakunagi
Telde
the mirror
Thladiantha
time variation control
tooth adjusting lever
tradp
ufcs
unselves
upward flight
vavra
web content