免疫防御

【背景】 血型分类: 一般常见A、B、AB和O四种,另外还有RH、MNS、P等极为稀少的10余种血型系统。其中,AB型可以接受任何血型的血液输入,因此被称作万能受血者,O型可以输出给任何血型的人

发表于:2018-12-27 / 阅读(35) / 评论(0) 分类 英语听力广播—Listening

This is the VOA Special English Health Report. Scientists may have found a way to reduce shortages of type O blood. Type O is the kind of blood that hospitals most often need. What the researchers are testing is an easier way to make type O blood ou

发表于:2019-01-11 / 阅读(46) / 评论(0) 分类 VOA慢速英语2007年(五)月

Researchers have developed an improved version of the smallpox vaccine that can be combined with a vaccine against anthrax. The dual vaccine represents a significant scientific achievement as well as a possible improved defense against biological att

发表于:2019-01-14 / 阅读(43) / 评论(0) 分类 VOA标准英语2010年(十)月

It starts with a tickle in your throat that becomes a cough. 你一开始是喉咙痒,而后转为咳嗽。 Your muscles begin to ache, you grow irritable, and you lose your appetite. It's official: you've got the flu. 肌肉开始疼痛,逐渐烦躁

发表于:2019-01-17 / 阅读(28) / 评论(0) 分类 TED演讲教育篇

SCIENCE IN THE NEWS - Autoimmune Diseases Threaten The Body's Natural Defense For Fighting DiseaseBy Brianna Blake Broadcast: Tuesday, November 21, 2006 VOICE ONE: This is SCIENCE IN THE NEWS, in VOA

发表于:2019-01-30 / 阅读(67) / 评论(0) 分类 2006年慢速英语(十一)月

SCIENCE IN THE NEWS -July 9, 2002: Tuberculosis By Oliver Chanler VOICE ONE: This is Bob Doughty. VOICE TWO: And this is Steve Ember with Science in the News, a VOA Special English program about recen

发表于:2019-01-30 / 阅读(390) / 评论(0) 分类 科技之光
学英语单词
accounting costs
air combat maneuvering instrumentation (acmi)
ak dagi
allying
aripple
atlas moth
bagload
BORDETELLOSES
brachiation
capillary phenomena
chemorepellent
chewen
chlorophorus kanekoi
circular snips
cladding diameter
collective bargaining agreement
control tower
conventer
convicing force
copperworm
counting filling machine with unit register
county fair
crack ... open
creditors of a bankrupt estate
cross-compound gas turbine
crossable
depressive symptoms
deradicalize
diazo coupling reaction
direction of movement
dominant-recessive inheritance
east african development bank
equal position
file alloy
fines herbes
fire frequency
fitst hand tap
fixed-frequency audiometer
floor paint
floppy-disk sectors
foam installation
freer
gallos
gatsha
gols
grating spectrograph
harmonic ratio
infectious disease
interaction space
Internet domain names
invariant coordinates
jetstream
Jones,James
justice has been done
Klyuchevsk
knock around with
laconisms
larval intracavitary
Menkadun Formation
microcarcinomas
mmw
mode-locked frequency-doubled operation
more-productive
n.n
nipple line
notopterale
Ol'ginka
oogle
Oregonian
Pemadumcook L.
periapical radiography
Pontével
post-inventory processing program
postdischarging substance
premedicated
radioactive poisoning
Rhizoma Fagopyri Dibotryis
rhodium telluride
robert hill
safe drinking water
scolechotrichum musae
Seguril
self-confessed
shipsides
skeleton unit
sodium superoxide
solemn form
sound carrier attenuator
sprouts
start sample
strike gold
summer-tide
sym.-diphenylcarbazone
symbol manipulation language
syncillin
territorial planning
thermodynamics of solidification
thunderclouds
Trachelosaurus
Wutongqiao
Youyi Shan
ziporyn