细胞膜受体

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:2018-12-03 / 阅读(99) / 评论(0) 分类 初学者听力文摘精选

Rachel Lee: The housing market keeps losing steam. Sales of previously owned homes fell 5. 7% last month according to the National Association of Realtors. If you're looking for a house , the group's

发表于:2018-12-05 / 阅读(103) / 评论(0) 分类 商业报道2006年

Fish do drink water, but how they consume it depends on where they live. Water gets into a fishs body through osmosis, the process in which water diffuses from a higher to a lower concentration. 鱼儿确实喝水,但它们怎样喝水却取决于其

发表于:2018-12-28 / 阅读(65) / 评论(0) 分类 初学者听力文摘精选

For something that could revolutionize the world, its come along very slowly. The fuel cell was invented in 1839, but there was little development until the 1950s when NASA started to use them in space where they are still used today. Now, after yea

发表于:2018-12-30 / 阅读(145) / 评论(0) 分类 国家地理2008年

Glucosamine - a glucose or galactose molecule with an amine group attached. see also glucuronic acid. Glucose - a molecule of great importance to life as it provides a ready source of energy for both

发表于:2019-01-03 / 阅读(118) / 评论(0) 分类 医务英语

Enamel prisms - rod-like bundles of hydroxyapatie crystals which are orientated at right angles to the tooth surface. Each prism can be traced from the outside of the enamel all the way to the dentine

发表于:2019-01-03 / 阅读(83) / 评论(0) 分类 医务英语

In Vitro - experiments which are carried out in a laboratory as distinct from in vivo experiments In Vivo -experiments which are carried out in live animals as distinct from in vitro experiments Immun

发表于:2019-01-03 / 阅读(113) / 评论(0) 分类 医务英语

Lymphocytes - white cells involved in the immune response. B lymphocytes are so called because they mature in bone while T lymphocytes mature in the thymus. Both cells look alike until they recognise

发表于:2019-01-03 / 阅读(88) / 评论(0) 分类 医务英语

Dermatan sulphate - a glycosaminoglycan found in skin, tendon, blood vessel and heart valves. Desmosomes -one of the types of cell junctions by which cells join or communicate with each other. Desmoso

发表于:2019-01-03 / 阅读(110) / 评论(0) 分类 医务英语

Darwinian medicine - an approach to the treatment of infective diseases which takes account of the co-evolution between the host and its parasite. Deciduous - from the Latin

发表于:2019-01-03 / 阅读(82) / 评论(0) 分类 医务英语

Covalent bond - a strong bond between atoms formed by sharing outer electrons. When an atom has 8 outer electrons it is stable. Those which naturally have 8, like neon and argon gasses are quite unrea

发表于:2019-01-03 / 阅读(97) / 评论(0) 分类 医务英语

Symbiosis - a mutually beneficial inter-relationship between two organisms, for example between bees and flowers (pollen carrying in return for nectar). Sympathetic nerves - the sympathetic nervous sy

发表于:2019-01-03 / 阅读(78) / 评论(0) 分类 医务英语

Morphogenesis - the process in which tissue shapes and organ structures are developed during embryology. Morphogenic fieled - an environment in which the shape or pattern of a developing organ is dete

发表于:2019-01-03 / 阅读(116) / 评论(0) 分类 医务英语

VOICE ONE: This is SCIENCE IN THE NEWS in VOA Special English. I'm Barbara Klein. VOICE TWO: And I'm Steve Ember. This week, we will tell about an American study of the brain disorder schizophrenia. We tell about cars that use hydrogen as fuel. And,

发表于:2019-01-11 / 阅读(145) / 评论(0) 分类 VOA慢速英语2008(十)月

Promising Target For Malaria Vaccine Identified British researchers have discovered a biochemical key used by the malaria parasite to invade human blood cells. The discovery could pave the way for an effective malaria vaccine. The Plasmodium malaria

发表于:2019-01-13 / 阅读(118) / 评论(0) 分类 VOA标准英语2011年(十一月)

Study: Malaria Parasite Has Achilles Heel 研究发现疟原虫也有致命弱点 Researchers say they have found a weakness in the malaria parasite that could lead to new drugs to block infection. The mosquito-borne disease kills more than 600,000 p

发表于:2019-01-14 / 阅读(66) / 评论(0) 分类 VOA标准英语2014年(七月)

疟疾疫苗研制取得新进展 British researchers have discovered a biochemical key used by the malaria parasite to invadehuman blood cells. The discovery could pave the way for an effective malaria vaccine. ThePlasmodium malaria parasite has a c

发表于:2019-01-14 / 阅读(238) / 评论(0) 分类 VOA标准英语2016年(八月)

For something that could revolutionize the world, its come along very slowly. The fuel cell was invented in 1839, but there was little development until the 1950s when NASA started to use them in space where they are still used today. Now, after year

发表于:2019-01-22 / 阅读(97) / 评论(0) 分类 自然百科2008年

Okay. 好了 So what is the daf-2 gene? 那么daf-2基因到底是什么? Well as you know, genes, which are part of the DNA, 正如大家所知,基因是DNA的一部分 they're instructions to make a protein that does something. 它们是经编码

发表于:2019-02-14 / 阅读(119) / 评论(0) 分类 TED演讲科学篇

There are several kinds of odor preventing and odor destroying treatments for textiles. For the most part, they work by killing or inhibiting the bacteria and fungi that cause odors. For example, these socks contain Quaternary Ammonium Compounds, or

发表于:2019-02-23 / 阅读(77) / 评论(0) 分类 英语时差8,16
学英语单词
across flow
adhesive-backed
aminotryptamine
antibank
artificial nuclear
aspidiopsoriasis
astroscopy
audit advisory committee
billament
blowing-crading-drawing unit
burning-off curve
butyl titanate
Canalis vomerorostralis
cancerations
canting coin
caudal neurosecretory system
center crank arm
central-western
chevese
cholestatic
chondroprotein
compensatory spending
complex line drawer
courtesy names
deadweight efficiency
diagonalizable matrix
Djoutou
double danger angle
dual system locomotive
dynamics of suspension system
equal interval
Excentrodendron obconicum
frauke
friedelin
friendly amendments
function with scattered zeros
galactose 1-phosphate
gas manifold
gas-holder transportable
golf clubs
gone Hollywood
greek-style
Gwyn, Eleanor (Nell)
hand brake lining
harum-scarumness
inclination of geomagnetic field
independent delivery service
information-flow
intercondylar fossa
It ain't over till the fat lady sings
kelpfishes
l'olivier
Lagorce
log jack
log-sector
macropapillary conjunctivitis
Maxwell inductance bridge
meate
mechanical air supply
midlife crises
mirror image switch
morphologie
National Transportation Safe Board
Nishikata
not (in) the least
omphalomancy
partner's notes payable
Parvovirinae
peak hours
peatless
phakoma
phenolsulfonphthalein excretion test
Plagiorhynchus
platform software
ponera chiponensis
Prelog's rule
rake-hell
reginald
rehauling
resource information bank
soft aggregate
Stygian
sympathetic nerve fiber
The Maria Luz Case
tiagra
tidal reduction
trajectory computation
tronolones
true-false test
Tunica conjunctiva bulbaris
U-cup packing
underacts
unification of law
usnaric acid
vacuum devices
vector ring
ventricular venous pulse
warracoori
weapon-shaw
woollike
yakuju