网状内皮细胞

What Is Progeria? Progeria was first described in the nineteenth century. The mysterious disease is often thought of as premature aging. Children with progeria are normal for their first year of life, but then develop medical problems normally seen i

发表于:2018-12-31 / 阅读(152) / 评论(0) 分类 英语听力文摘 English Digest

EXPLORATIONS -February 27, 2002: Fuel Cell Cars By Mario Ritter VOICE ONE: This is Mary Tillotson. VOICE TWO: And this is Steve Ember with the VOA Special English program EXPLORATIONS. Today we tell a

发表于:2019-01-02 / 阅读(208) / 评论(0) 分类 Explorations

By Melinda Smith Washington, DC 22 June 2006 watch Stem Cell report A new medical treatment injecting embryonic stem cells and other drugs into paralyzed mice has researchers wondering if it could eventually help humans suffering from Parkinson's an

发表于:2019-01-09 / 阅读(203) / 评论(0) 分类 2006年VOA标准英语(六月)

A: Nice to see you; how have you been feeling lately? B: I have been feeling great, Dr. Smith. A: I am happy that you have decided to come in for your annual physical. B: Yes, I am going on a cross-country bike ride on vacation and want to make sure

发表于:2019-01-11 / 阅读(182) / 评论(0) 分类 英语情景对话-健康

A: Hello, so how are we feeling today? B: Things are going well for me, Dr. Smith. A: Am I correct in thinking that you are here for your annual physical? B: Yes, I am applying for new health insurance, and I need a physical examination to qualify. A

发表于:2019-01-11 / 阅读(189) / 评论(0) 分类 英语情景对话-健康

A: Good morning, how are you doing today? B: I have been feeling pretty good, Dr. Smith. A: So, I can see by your chart that you are here for your annual physical. B: Yes, I am playing on the tennis team this year, and they are requiring me to get a

发表于:2019-01-11 / 阅读(202) / 评论(0) 分类 英语情景对话-健康

By Efam Dovi Accra 23 August 2006 In Ghana, a high court in the capital Accra Tuesday sentenced five robbers to more than 300 years in prison in what the police say is a clear sign the country is taking violent crime seriously. The spate of armed ro

发表于:2019-01-11 / 阅读(271) / 评论(0) 分类 2006年VOA标准英语(八月)

This is the VOA Special English Health Report. How important is your mobile phone, better known to Americans as a cell phone? MAN: I use my phone all the time. I'm always on my phone. WOMAN: It's kind of pretty much important to me because it's like

发表于:2019-01-12 / 阅读(176) / 评论(0) 分类 2011年VOA慢速英语(三)月

Power Your Laptop by Taking a Walk Scientists at the University of Wisconsin-Madison have developed a technology that turns human motion into electricity. In this week's journal Nature Communications, they describe how to power a cell phone or other

发表于:2019-01-14 / 阅读(189) / 评论(0) 分类 VOA标准英语2011年(八月)

Scientists Point to Possible Health Effects of Cell Phones This past May, in a major policy shift, the World Health Organization said electromagnetic fields produced by mobile phones are possibly carcinogenic. Although the International Association f

发表于:2019-01-14 / 阅读(195) / 评论(0) 分类 VOA标准英语2011年(八月)

A: My doctor says that I need a blood test. B: I can help you with that. Just have a seat and roll up your left sleeve. A: What are you taking my blood for? B: Your doctor has requested a check of your white blood count. A: What information does that

发表于:2019-01-15 / 阅读(203) / 评论(0) 分类 英语情景对话-健康

a butterfly with glowing eyes Believe it or not, Monteiro and her team insert ed a new gene into the butterflys genetic sequenceone taken from a jellyfish . No, I know you're fooling. Actually I'm not. This gene codes for a green florescent protein t

发表于:2019-01-26 / 阅读(137) / 评论(0) 分类 英语听力文摘 English Digest

Why are there males and females? Why are there two sexes instead of three, or twelve, or one? On todayss Moment of Science we'll learn why two is the magic number. Let's start with why there is sex at all. When two organisms reproduce sexually, sperm

发表于:2019-01-26 / 阅读(157) / 评论(0) 分类 英语听力文摘 English Digest

Fish live in water, but do they drink it? The answer is yes, but how fish drink water depends on where they live. Water gets into a fish's body through osmosis, the process in which water diffuses from a higher to a lower concentration. For example,

发表于:2019-01-26 / 阅读(157) / 评论(0) 分类 英语听力文摘 English Digest

Under normal circumstances, each of your brain cells allows various substances, such as sodium, calcium and potassium to permeate its outer cell membrane. Once inside the brain cell, these substances help give the cell stimulus it needs to function p

发表于:2019-01-26 / 阅读(170) / 评论(0) 分类 英语听力文摘 English Digest

By Amanda Cassandra New York 09 November 2006 Movie star Robert Redford's Sundance Film Festival is teaming up with global cell phone operators to bring short films to cell phones to give people around the world access to independent films. Robert R

发表于:2019-02-05 / 阅读(200) / 评论(0) 分类 2006年VOA标准英语(十一月)

Turn Off Your Cell Phone 关掉你的手机 We went to the movie the other night. I sat in an aisle seat as I usually do, because it feels a little roomier. Just as the feature was about to start, a blonde from the center of the row got up and starte

发表于:2019-02-07 / 阅读(296) / 评论(0) 分类 趣味英语

Topics: Alcatraz; The Simpsons; using negation with an infinitive; heaven versus heavens; kind of versus sort of versus type of Words: to escape guard jailbreak cover-up cell haunted animated dysfunctional family trouble-maker pacifier merchandise le

发表于:2019-02-23 / 阅读(157) / 评论(0) 分类 美语听力 English Cafe

How Cells Get Around 漫步的细胞 A major reason why many cancers are so dangerous is that they metastasize . This means that instead of staying in one place, the cancer cells migrate from their original site to other parts of the body. No wonder

发表于:2019-02-24 / 阅读(146) / 评论(0) 分类 英语听力文摘 English Digest

Topics: Types of prisons and the parole system; American cities: Austin; using prepositions with the days of the week; for the world to owe (one) something; late/early morning, afternoon, and evening Words: prison to pose a threat solitary confinemen

发表于:2019-03-05 / 阅读(267) / 评论(0) 分类 美语听力 English Cafe
学英语单词
Abdullahpur
abintestate
adjacent channel frequency
Allaeanthus
ancestral task
anisomerism
antao
band-limited white noise
bandstop
be good with
benzomethamine chloride
blanket release number
calomelol
Clapstain
Claraville
code inspection
coefficient of migration
commercial zoning
committee on internal auditing
common milkworts
controller ready status in
creep drinker
cyclical redundancy check (crc)
D2E7
deactylation
distribution of national income
dormiol
duty-paying value
elastic transmission
electron scattering process
engage sb in
english-man
epipubic bone
Ernstbrunn
filopodial
flensers
foreappointment
gassiness
Ghīrān, Ra's al
gluconic acid dimethylaminoacetate
hand reset relay
have potential
high-angle gun
high-quality materials
ipidaes
Isomalto-dextranase
jenghiz khans
junctophilin
larroumet
lawhead
lead computing optical sight system
leuco(cyto) penia
mammaries
marginal distribution
marginalists
Mokpo
moorlandish
moviestars
neohesperidose
nippobodes insolitus
nitrogen bridge
nonadoption
oast houses
ophioglossum petiolatum
overspecified
oxazinyl
paracrinid
Pasania rhombocarpa
pepine
piston hydroreducer
poison sb's mind(s)
positive outlook
potassium azide
pulp washing
Rankin County
rankles
revolving bundle holder
Sarmiento, Can.
saturated surface dry condition
scintillogram
shipping invoice
sotsky
spergy
stream piracy(robbery)
subcloning
take sth out on
tamias
tape-controller
theli
trimethyl-ethylene
TZD
ulopyranoses
unauthored
uncircumscriptible
undergetting
upgrade industries
value-theory
variable exhaust nozzle
vernier goniometer
wbx
wheel in
wide-band signal