四环素

By Carol Pearson Washington 28 February 2007 watch Antibiotic Resistance report Penicillin and Erythromycin are examples of antibiotics that used to be one-time miracle cures. These drugs and other antibiotics are now less effective because bacteria

发表于:2018-12-16 / 阅读(157) / 评论(0) 分类 2007年VOA标准英语(二月)

STEVE INSKEEP, HOST: This year Americans will spend more than $2 billion on probiotics, supplements aimed at boosting what are called good bacteria inside us. One part of the market that's growing rapidly is probiotics for babies and kids. Here's NPR

发表于:2018-12-17 / 阅读(135) / 评论(0) 分类 2018年NPR美国国家公共电台5月

This is Scientific American Sixty Seconds Science, I'm Sophie Bushwick, got a minute? When Mexican tetra fish moved into darker caves long ago, they evolved to deal with the dark by becoming albino and going blind. A new research shows that the chang

发表于:2018-12-24 / 阅读(202) / 评论(0) 分类 Scientific American(一)月

Rainforests exist because it rains a lot and that makes the forests grow, right? Well, not so fast. What if its not the rain that makes the forestswhat if its the forests that actually generate the rain? Thats the contention of a paper in BioScience

发表于:2019-01-02 / 阅读(211) / 评论(0) 分类 60秒科学

T Tanshinone IIA 丹参酮IIA Tanshinone I 丹参酮I Tanshinone IIB 丹参酮IIB Taraxasterol 蒲公英甾醇 Taraxerol 蒲公英赛醇 Tauro ursodesoxy cholic acid 牛磺熊去氧胆酸 Taxifolin 花旗

发表于:2019-01-03 / 阅读(182) / 评论(0) 分类 医务英语

Rainforests exist because it rains a lot and that makes forests grow, right? Well, not so fast. What if its not the rain that makes the forests? What if its the forests that actually generate the rain? That is the contention of a paper in BioScience

发表于:2019-01-08 / 阅读(171) / 评论(0) 分类 Scientific American(五)月

ROBERT SIEGEL, HOST: Now some good news, especially for babies around the world. Scientists in the U.S. and India have found an inexpensive treatment for a common infection. It could save hundreds of thousands of newborns each year. The treatment com

发表于:2019-01-16 / 阅读(182) / 评论(0) 分类 2017年NPR美国国家公共电台8月

RACHEL MARTIN, HOST: Go online, walk through any health store or supermarket, and you'll find all kinds of products being sold as probiotics. They're being promoted for all kinds of things - preventing upset stomachs, boosting the immune system, figh

发表于:2019-01-16 / 阅读(149) / 评论(0) 分类 2017年NPR美国国家公共电台12月

Probiotic yoghurt drinks and supplements dont live up to their promises, according to an EU watchdog. They claim to boost your immune system and help digestion. It concluded there is no scientific proof that products such as Yakult have any health be

发表于:2019-02-04 / 阅读(153) / 评论(0) 分类 阅读空间

10 Getting The Lead Out 第十章 把铅撵出去 In the late 1940s, a graduate student at the University of Chicago named Clair Patterson (who was, first name notwithstanding, an Iowa farm boy by origin) was using a new method of lead isotope measur

发表于:2019-02-17 / 阅读(210) / 评论(0) 分类 万物简史
学英语单词
addight
ancient mariners
animal and insect wounds
anorectal stenosis
anti-trades
Antirion
autopagnosis
barium sulfocyanide
Beggars must cannot be choosers.
binocular tube
blatters
blessinger
blind bag
bone remodeling
brick grab
building paperboard
Celubrinae
centeredness
chart desk
chiral field
Chōsei
clinching screw wire
coarseness of cut
color-copy
concave ground
Conulariid
creutzfeldt - jakob disease
curvature of lens
deferred availability cash items
delcap
distichal plate
divine proportion
electrotubogram
explosive trace detections
five percenter
Fowler function
free damped
free livings
great trochanter of femur
Gwangi
hereditary spherocytosis
hyperchloremia
inter-observer
internal damping coefficient
inverted solubility
ischias
keel muscles
koita
Lachesis
lengthwise feed lever slide block
leptomya cochlearis
leukonin
locking ball
loexes
malignant sarcoma
mass units
medemycin tablet
mid-door
minimization of band width
Miryang
move-ments
mucopolysaccharidosis type IH
nonlinear theory
off-axis elastic modulus
on the hip
orange sneezeweeds
original soil
other auditing procedures
paramagnetic Faraday rotation
Peninsular War
piggingback
Piophila
potassium magnesium sulfate
radices hemerocallis
raked table
remineralizing
removable mandrel type forming die
scene-steal
sector incidence of taxes
set sb off doing
single-column manometer
Sodasone
solar telescope
southwest
starbuck
static mif
sunset yellow
supercooling field
switching threshold
taxi-ing
Thalictrum contortum
Thorvaldsen, Albert Bertal
throwing into
tie
tissue mincer
trichloroacetic acid methyl ester
true bearing unit
ultraripe
ululative
universal tool makers microscope
werder bremen
womaniser