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(102) / 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(99) / 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(99) / 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(85) / 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(126) / 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(97) / 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(114) / 评论(0) 分类 CCTV9英语新闻2014年01月
学英语单词
accidental poisoning
acetic starch
alternate test for variance heterogeneity
Apache Lucene
arminian baptists
beardiest
bir (bhir)
birdwing
boiling water sealing
cathode peaking
centralized installation of welding machine
chabin
chenopodium ficifolium smith
claros
co-judge
cold air outbreak
colo(u)r screen
complete variation of signed measure
complex organization
confidence curve
connecticut-based
conyzas
coon dog
cotyledon spinosa l.
crestoted pole
democratic network
dense upper cloud
direct red
dogdays
domestic telegram
drip-proof screen-protected machine
dynamic case management
elbow forward
Endofolliculina
Fisebu
goods for consumption
Gore-Tex graft
high-frequency direction finding
hydrochloric acid intermediate storage tank
impersuadable
in every case
influence diagram
insidiousnesses
insulating braiding
interest-free
internal server error
iron roll
Jeremy Diddlers
jonkins
Jurva
Kadiak
kamimuria lepida
keycodes
kicked ass
lay-up molding
lock strike
locking screws
macrocyclic polythiaether
mumchances
nevocytoma
night - blooming cereus
of draft
orienting roll
pacambocythere u-carinata
page depth
passauite (mizzonite)
peditoxin
plane-concave lens
polykaryon
prively
profit economy
regulating multizone production rate
river bar
ropebarks
scorpaenopsis diabolus
see with one's own eyes
shwarma
single-phase speed regulating motor
sleep away
spirit stoves
spurious brain tumor
steering-wheel pointer
stereo-homo-polymer
stifled
stirred bed agitator-conveyor
supplemental charge
switch machine repair
timber drug
time averaged velocity
tkaa
torpedo spotting indicator
Tosenfjorden
two-way set-associative architecture
unaccommodatingness
unperturbed atmosphere
Urtica fissa
vittatus
whanny
without provocation
world premieres
wound rotor