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(335) / 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

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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(365) / 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(294) / 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(373) / 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(383) / 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(372) / 评论(0) 分类 CCTV9英语新闻2014年01月
学英语单词
accede to sth
acidification of alkaline water
additional coordinates
anglets
arshine
athyrium arisanense
bani tukhman rocks
batten underdrain
biomachine
bryaless
Bykivka
class-neutral
Clean Report of Findings
completer segmentation
constant instruction
corpuscular rays
Dandaragan
Daya Abeidi
deffeyes
diethylcarbamazine
dispatching communication
DLPT
earplugging
elastic plastic fracture mechanics
ex vivo perfusion
fading depth
field emitter display
flat interest rate
fold amplitude
frontier inspection
Gallur
geomagnetism
Geranium sibiricum
gland lead-off system
greenshoe option
ground-up
half-reactions
hoop-skirts
horches
hypoactive sexual desire disoreder
interface tension
justify oneself for one's conduct
kikka
leaf area ratio
Lindenberg, Cachoeira
losingly
macana
mactaggart telemotor
manpon
marcottages
measuring cylinder with spout
mitochondrial gene
mixed mastoid
modulus theory
monadal
moonfleet
mufflerless
nascimento
navy oiler
Negombo
nondependence relation
note issurance facilities
nuclear screening
ocean colour measurement
offence of disclosing military secrets
ottringham
pelhamine
per item limitation
PFIAB
photoangiolytic
piezoresistive acceleration transducer
playmat
plussage
pollinator
protg
reorganization proceedings
requirement specification
rightfully
rule matching
salinity logging
scale new heights
show ... around
sleep-walk
solid post
special operations liaison element
spun fabric
Strait of Malacca
subcisive
suffern
super-lightweight
supporting lug
target information centre
temperature control device
Theresa Creek
thowl
transferase
transitive relations
traveler's tale
twenty-pasts
two-dimensional time
undecreed
wilhede