马氏斑蚊

Financial experts agree that part of the economic slowdown over the last few years can be attributed partly to the demise of the so-called dot-coms. Investors threw lots of cash at these start-up internet businesses, despite having no clear idea of h

发表于:2018-12-05 / 阅读(105) / 评论(0) 分类 英语听力文摘 English Digest

The complex vocalizations of songbirds are learned, not inherited. Some even have regional accents. Wrens, thrushes and other songbirds don't hatch with their impressive musical talents. They learn to sing their extensive repertoires by listening to

发表于:2018-12-05 / 阅读(97) / 评论(0) 分类 英语听力文摘 English Digest

President Bush says the key to a strong economy is the creation of more small business. But statistics show that most startups are doomed to fail. However, the experts agree that with planning and hard work a new company can beat the odds. This morni

发表于:2018-12-05 / 阅读(100) / 评论(0) 分类 英语听力文摘 English Digest

In the 17th century, the French scientist Pierre Gassendi knew that light traveled faster than sound. When a gun fired far away, he could see the flash of gunshot long before he heard the report. Gassendi tried to measure the speed of sound by clocki

发表于:2018-12-31 / 阅读(117) / 评论(0) 分类 英语听力文摘 English Digest

By Deborah Block Washington, DC 24 April 2006 watch Wal Mart Banking report The world's largest retailer, U.S.-based Wal-Mart, is hoping to begin its own banking business soon. Critics are concerned i

发表于:2019-01-07 / 阅读(178) / 评论(0) 分类 2006年VOA标准英语(四月)

Cloning Pets Is animal cloning for real? I want to have my cat cloned. Well, animal cloning technology exists, but pet cloning isnt quite there yet. And it may never be. Why not? I could think lots of people could want to have copies of their pets. T

发表于:2019-01-26 / 阅读(113) / 评论(0) 分类 英语听力文摘 English Digest

AntIntrigue 蚂蚁的阴谋 Don: Hey,antslives are full of intrigue. Take slave-making ants. They invade other ants nests, kill some of the adults, and then steal the larvae and take them back to their own nests. The larvae learn who they belong to b

发表于:2019-01-26 / 阅读(113) / 评论(0) 分类 英语听力文摘 English Digest

The Ant and the Dove An ant went to the bank of a river to quench its thirst, and being carried away by the rush of the stream, was on the point of drowning. A dove sitting on a tree overhanging the water plucked a leaf and let it fall into the strea

发表于:2019-01-26 / 阅读(105) / 评论(0) 分类 英语听力文摘 English Digest

By Michael Bowman Washington 16 July 2006 Secretary of State Condoleezza Rice says Iran and Syria are fomenting conflict in the Middle East by supporting Hezbollah and other militant groups. ------- Condoleezza Rice (r) and George Bush at the G-8 su

发表于:2019-01-31 / 阅读(194) / 评论(0) 分类 2006年VOA标准英语(七月)

By Melinda Smith Washington, DC 04 January 2007 watch Meningitis in Children Meningitis can be infectious, particularly when the disease is spread among large groups of people living in crowded conditions. It is most prevalent in sub-Saharan Africa,

发表于:2019-01-31 / 阅读(170) / 评论(0) 分类 2007年VOA标准英语(一月)

By Benjamin Sand Islamabad 05 June 2007 Pakistani journalists hold oil torches as they march towards presidency during rally to condemn crackdown against media, in Islamabad, 04 June 2007 Pakistani journalists and media rights activists are lashing o

发表于:2019-02-12 / 阅读(209) / 评论(0) 分类 2007年VOA标准英语(六月)

Ant Attack! Imagine this. Youre coming home to your gated community after a long day of work. As you stop to show the guard your ID, a mugger jumps out from behind a bush and grab s you by the mouth. Okay, that last part sounded a little weird, but t

发表于:2019-02-16 / 阅读(115) / 评论(0) 分类 英语听力文摘 English Digest

Bedtime Blues 尿床的困扰 Never a happy topic, bed wetting is a very distressing problem for five to seven million American kids. If we cant explain why some people like to pick on these kids, can we at least shed some light on what causes bed we

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

The Parts of Metabolism 新陈代谢到底是什么? What is metabolism really? Statements like he can eat a lot because he has a fast metabolism are somewhat misleading. Metabolism isnt about the digestion of food in your stomach; its the name giv

发表于:2019-02-24 / 阅读(134) / 评论(0) 分类 英语听力文摘 English Digest

The Lithic Principle 我们生活的星球上自然法则是亘古不变的吗?我们人类是不是自我感觉太过于良好? Time again for the mailbox.Let's see.Here:A Moment Of Science,I heard recently that if the laws of nature were change

发表于:2019-02-24 / 阅读(116) / 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(115) / 评论(0) 分类 英语听力文摘 English Digest

The Denatured Egg White 煮鸡蛋还有那么多学问哪?在煮鸡蛋过程,鸡蛋会发生哪些变化呢? 蛋白质变性(protein denaturation)是指蛋白质在某些物理和化学因素作用下其特定的空间构象被改变,从而导致

发表于:2019-02-24 / 阅读(120) / 评论(0) 分类 英语听力文摘 English Digest

Acanthostega 这种生物已经演化出前后肢,但每肢都有8趾。这种生物是从鱼类进化到两栖类的过渡产物。而且,它具有更多的鱼类特征,如有鳃、鳍和只能在水中起作用的感官。伦敦自然历史博

发表于:2019-02-24 / 阅读(120) / 评论(0) 分类 英语听力文摘 English Digest

Nice Set of Pipes 尽管管风琴对我们来说还是比较生疏的乐器,但它的发音原理与我国民间流传至今仍在使用的古老乐器芦笙十分近似。据史料记载,公元前250年前古希腊工程师克提西比奥(Ktes

发表于:2019-02-25 / 阅读(128) / 评论(0) 分类 英语听力文摘 English Digest

A Pain in the Ear 耳痛是一种常见病,耳痛为常见症状,常因耳部疾病引起(原发性或耳源性耳痛),也可因耳部邻近器官或其他器官疾病所致(继发性或反射性耳痛)。耳痛的严重程度与病变的

发表于:2019-03-09 / 阅读(391) / 评论(0) 分类 英语听力文摘 English Digest
学英语单词
?-secretase
Abbassides
abu el jirdhan
Apostoles
as-weldedcondition
augur well
Bacon, Francis
best piece
betwene
black collector
bleaching apparatus
button cell battery
C-alkylation
cantilever supporting struts
carrageen
catalyst for automobile exhaust
cladocerans
coin box telephone
commodome
complain
continuous ladders
cookmaids
crown lens
days of operation
dealcoholization agent
debugging event
dermal gland ducts
Dobrun
dyadic array
equivalent height
false harmonics
free blowing
funk metal
giantarum
gibbose
Goodman paradox
grasple
hawaiian capitals
horse chestnut tannin
incompetently
innocentive
journal of shaft
light refined products
line delay
lombardic rhythm
Mandrikovo
metal ferrite semiconductor fet
microtrends
midoceanic islands
minitelevision
misdetermines
Mithratic
money circulates
monogenetic development
monopolistic competition
multi-functional counter
nanometer-size
neuroinflammation
not by a fractional
oligodactylia
oogonesis
organic function of productivity
pettibones
plastide
practice sessions
propheticism
pulvinitid
purchase price
put your shirt on sth
queen's pawn
railroad rail
replacement investment
ribble-rabble
rippled slope
saturated steam temperature
sclero-ridencleisis
secondary model
semel major semper major
serial controller
sferix
shaded cloth
snaths
sodide
Sonotone battery
standard branch
storage loss
stub land
Sunday driver
sytolysis
tert-amyl isovalerate
three way cock
Toxoden
transient ischemic attacks
traumatosepsis
trinity ophiolite
upper core structure
variable gearing
ventral ridge
web security
Whore of Babylon
wired AND
working capital source