[医] 粪产硷杆菌

“I have a dream...” It is among the most celebrated speeches in American history. “My four little children will one day live in a nation where they will not be judged by the color of their skin

发表于:2018-11-28 / 阅读(238) / 评论(0) 分类 疯狂英语2002年

In this Moment of Science Yael and Don discuss how women can see more color. Yael: Not only are eight percent of men colorblind, but even compared to men who can distinguish between reds and greens, many women may live a more colorful existence. That

发表于:2018-12-05 / 阅读(93) / 评论(0) 分类 英语听力文摘 English Digest

Shareholders of the telecommunications equipment manufacturers Alcatel and Lucent have approved an $11 billion merger of the two companies. The new company, which will be called Alcatel Lucent, will be the world's largest telecommunications equipmen

发表于:2018-12-30 / 阅读(195) / 评论(0) 分类 初级商务英语听力2006

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(108) / 评论(0) 分类 英语听力文摘 English Digest

Why Does Spot Have Spots? In dogs with multicolored coats, white areas have no pigment cells. Black, brown or yellow areas, on the other hand, get their color from special pigment cells. When a dog is just an embryo, these pigment cells travel from t

发表于:2018-12-31 / 阅读(109) / 评论(0) 分类 英语听力文摘 English Digest

Glow In The Dark Cats, Monkeys, And HIV Have you heard the one about the jellyfish, the monkey, and the glow in the dark cat? Actually, its no joke: scientists are experimenting with ways to combat HIV and AIDS by injecting cats with genes taken from

发表于:2018-12-31 / 阅读(102) / 评论(0) 分类 英语听力文摘 English Digest

How Neanderthals Fought Disease Every year people are encouraged to get their annual flu shots. Signs are posted at drug stores and clinics. Get your shots here. Modern preventive medicine has saved millions of lives. But you may be surprised to hear

发表于:2018-12-31 / 阅读(91) / 评论(0) 分类 英语听力文摘 English Digest

Next time you get your debit card out, you might want to use it to buy some hand wash. A study has found that nearly one in 10 bank cards contains faecal matter. Cash is little better with one in seven bank notes containing high levels of bacteria si

发表于:2019-01-08 / 阅读(135) / 评论(0) 分类 英美文化

Winter Wheat According to the famous song, America is beautiful for its spacious skies, purple mountains, and amber waves of grain. If you were to make a music video based on these lyrics youd probably want mid to late summer images of fruit-laden tr

发表于:2019-01-26 / 阅读(143) / 评论(0) 分类 英语听力文摘 English Digest

Ya?l: Somebody bought my daughter a game called Cuddies. Don: I love that game! Y: I don't know about that. But the little plastic tongue-like part of that strange insect like body did inspire me to wonder about taste and insects. Do insects have t

发表于:2019-01-26 / 阅读(109) / 评论(0) 分类 英语听力文摘 English Digest

About six or seven million years ago chimpanzees and humans evolved from a common primate ancestor. Chimps went on to become the relatively small-brained, forest dwelling creatures we know and love. Humans went on to evolve large brains, spread throu

发表于:2019-01-26 / 阅读(90) / 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(127) / 评论(0) 分类 英语听力文摘 English Digest

Nutrigenomics The study of genes has shown that every individual is genetic ally unique, and this discovery leads to a host of questions as to the relationship between an individuals genes and environmental factors such as diet. That is, how does die

发表于:2019-02-16 / 阅读(119) / 评论(0) 分类 英语听力文摘 English Digest

DNA Wrath of Khan 成吉思汗疯狂的基因 Today, Afghanistan is a war-torn region, battled over by military forces and world-spanning empire s . Eight hundred years ago things were much the same. Only then, there was only one ruler: Genghis Khan.

发表于:2019-02-24 / 阅读(173) / 评论(0) 分类 英语听力文摘 English Digest

Dmitry Belyaev, Foxes, And Domestication 你与猫或狗玩耍过吗?在远古,狗对我们的祖先来说还是一种比较危险的动物呢。那么,现在为什么它们这么听话?我们的祖先又是如何驯化它们的呢?今天,就

发表于:2019-02-24 / 阅读(441) / 评论(0) 分类 英语听力文摘 English Digest

Nutrigenomics 营养基因组学(nutrigenomics 或nutritional genomics,又叫营养遗传学 nutrigenetics)是研究营养素和植物化学物质对机体基因的转录、翻译表达及代谢机理的科学。 膳食是影响人体健康最重

发表于:2019-02-24 / 阅读(124) / 评论(0) 分类 英语听力文摘 English Digest

Why Clones Arent Copies 克隆是英文clone或cloning的音译,而英文clone则起源于希腊文Klone,原意是指以幼苗或嫩枝插条,以无性繁殖或营养繁殖的方式培育植物,如扦插和嫁接。在大陆译为无性繁殖在

发表于:2019-02-24 / 阅读(139) / 评论(0) 分类 英语听力文摘 English Digest

Mans Best Friendin All Shapes and Sizes Scientists are making great strides in understanding the genes that allow such a wide range of shapes, sizes and personalities in different dog breeds. Did you know domestic dogs were bred from wolves about 15,

发表于:2019-03-09 / 阅读(167) / 评论(0) 分类 英语听力文摘 English Digest

The Ancestry Of Snakes 古生物学界的一部分学者认为,蛇是由陆地蜥蜴的一个分支进化而来的,在进化的过程中,它们的脚逐渐退化消失了,而身子则变得越来越细长。另一种流行观点则认为蛇的前

发表于:2019-03-09 / 阅读(163) / 评论(0) 分类 英语听力文摘 English Digest

Fatherless Honeybee s How male honeybee s can be without fathers? The reason lies in whats called a haploidiploid system of sex determination. Approximate ly one-fifth of the animal kingdom, including ants and wasp s , use this system. What it boils

发表于:2019-03-09 / 阅读(229) / 评论(0) 分类 英语听力文摘 English Digest
学英语单词
A. E. Burnside
acoustic device
activity program status word
ADF bearing indicator
AGDT
anal(-)retentive
anticipated interest
argento-pereylite (boleite)
auspiciousnesses
baromacrometer
Bisiac
brain-specific
can bank
CCL13
Cerys
Chalencon
channel bass
cholecystagogic
coleridges
conflewence
counterrotations
coupling length
cresylite
cross connecting cabinet
crumbcruncher
deformation cochain
demand of view
descure
disruptive currency flow
dot sequence
Erich
faculty of memory
field breaking switch
fraises des bois
glandilemma
gravity bag
Guadalmena, Embalse de
Hagetmau
harmonizing yingfen and weifen
helical oil groove
herniary
high speed duplex printing
hoist redution gear
i-passed
incomplete polynomial
intilted
IPSP
Jadassohn's test
Jensen's inequality
job time
jumper cable
launching accuracy
left anterior axillary line
light-fingered gentry
linear sort
lower third
moules
musa textiliss
myoepitheliosis
nabob
nonsyncopated
nuclear powered cogeneration power plant
off-field
optic normal
ostentous
Pacman defence
parganas
pathies
pay on receipt
periodic annual growth
permanent echo
plebile
postcolonialities
privacy transformation
pseudoxanthoma elasticum
radices penis
raster image boundaries
recent sediments
restricted edge-emitting diode
Retropancreatic
sacred mountain
sense finding switch
sepulchers
single family
square up
stereo isomerism
strong evolution
superhigh speed steel
tabor pipe
tartaric acid
telescoping tube
tennessee rivers
tera-watts
toothenague
tracing mark
Viksjö
vitrinitics
yawing force
yolo
zoned bit recording
zuds