音标:['heptæd] ;
n. 七个, 成七的一组, 七价原子
[化] 七价物; 七价的
n the cardinal number that is the sum of six and one
词型变化:名词复数形式 : heptads
【近义词】

PEOPLE IN AMERICA -October 27, 2002: Alan Shepard By Avi Arditti VOICE ONE: I'm Shirley Griffith VOICE TWO: And I'm Steve Ember with the VOA Special English program, People in America. Each week we te

发表于:2018-12-15 / 阅读(377) / 评论(0) 分类 People in America

Abolitionists and Amistad Raise Slavery Issue From VOA Learning English, welcome to The Making of a Nation our weekly program of American history for people learning American English. Im Steve Ember in Washington. Last week on our program, we talked

发表于:2019-01-12 / 阅读(386) / 评论(0) 分类 2014年VOA慢速英语(四)月

Supreme Court Rules in Amistad Slave Ship Case 美国最高法院接管雅米斯泰德号奴隶船的案件 From VOA Learning English, welcome to The Making of a Nation a weekly program of American history for people learning American English. Im Ste

发表于:2019-01-12 / 阅读(410) / 评论(0) 分类 2014年VOA慢速英语(四)月

Sing to me,my dearest nightingale,said a shepherd to the silent songs tress one beautiful spring evening.Alas!said the nightingale,the frogs make so much noise,that I have no inclination to sing.Do you not hear them? Undoubtedly I hea

发表于:2019-02-01 / 阅读(326) / 评论(0) 分类 趣味英语

Beginners. The color yellow is very 'in' at the moment, mainly because of the Tour de France. It is a spectacular event that my husband and I follow every year. Infact, now that it is over, we are in mourning. What are we going to do now, Babe? I ask

发表于:2019-02-06 / 阅读(424) / 评论(0) 分类 英语博客 A cup of English

A bureaucrat was hiking when he came upon a shepherd tending a large flock. The bureaucrat took a fancy to the sheep and asked the shepherd, If I can guess how many there are, may I have one? The shepherd thought it unlikely the man would guess the e

发表于:2019-02-07 / 阅读(433) / 评论(0) 分类 趣味英语

By CCTV Tang Bo Chinas three major hepatitis B vaccine makers have been ordered to suspend production. The countrys Food and Drug Administration made the announcement after the companies failed to get certified under the new Pharmaceutical Products s

发表于:2019-02-07 / 阅读(410) / 评论(0) 分类 CCTV9英语新闻2014年01月
学英语单词
acidism
aerostatical
ammonium hyposulfite
antidementia
attenuated total refraction
aural critical band
basal cover(age)
basket bottom
bass ackwards
bayeaux lace
benting time
Beresh
bird's-eye spot
boed
borelidin
bound circulation
boy juice
broncotosil
business institution
cheese it
conioscinella formosa
cooling process
coplanarity error
cum-rights
cut-in temperature
dandying
desublimating
distance between grinding wheels
dudesses
Edinger's nuclei
electric portable lamp
electrical heating method
Euonymus giraldii
fashioning
fening
Fentanest
fluke palm
formational geology
gastrosoph
genus Bulnesia
give up for lost
gourdshaped
grizzliest
health work
heavy soil
herbicolous
hiddenmost
hot water bath
impatiens apalophylla hook.f
intermediate rinsing
K7
kettle chain
kimara
leg of a triangle
lexicographists
low mark
lucumone
male-patterned baldnesses
maximum production
Maxwell's theorem
microtesla
miniplate
monkeyjack
mont-cenis process
newsstands
nonacid
numinal
oligo-dT
paraboloidal reflector
pencil rounded
peronospora brassicae
perturbative function
phrenic nucleus
porridgelike
puzzle one's wits
quarrel with sb over sth
reactor coolant (circulating ) pump
Regnéville
removable wind crank
replenisher
riprap protection
salt tolerant bacteria
San Gabriel
schygge
shock resist
significance of selling activities for consumer preference
small hourss
Subbiano
supply of labor
take a dirt nap
taxi procedure
theveside
to set a derrick down
transporting tractor
trimming guide
turbo unit
unweighed
voltaic irritability
waste solidification system
well-flared bow
ypad
Yttro-columbo-tantalite