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This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. The Earths crust is old. Billions of years old. So old that its nearly impossible to imagine. And now scientists have discovered what may be the oldest

发表于:2018-12-24 / 阅读(135) / 评论(0) 分类 Scientific American(九)月

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Theres definitely methane on Marsand there are seasonal variations of how much is being released into the thin Martian atmosphere. Which means that Mar

发表于:2019-01-08 / 阅读(135) / 评论(0) 分类 Scientific American(一)月

What does an 800-pound gorilla eat? If you said: anything it wants, youre not thinking like a scientist. A scientist would say, Let me analyze the isotopic composition of its excreta and Ill get back to you. Because a new study shows that the ratio o

发表于:2019-01-08 / 阅读(121) / 评论(0) 分类 Scientific American(十二)月

[ti:UNIT 7 Know Our World Coming! Lesson 49: Let's Learn Geography!] [0:00.291]UNIT 7 [0:02.469]Lessons 49~56 Lessons 49~56 [0:05.445]Know Our World [0:07.187]You Will Learn 你会学到 [0:08.930]Functions 功能 [0:10.018]Talking About Numbers 谈论

发表于:2019-01-09 / 阅读(322) / 评论(0) 分类 河北教育初中英语(初中起点)八年级下册

Scientists Closer to Solving Plain of Jars Mystery A new group of human remains has been uncovered on the Plain of Jars in Laos. They are believed to date back to the Iron Age, some 2,500 years ago. The Plain of Jars is in the central Lao province of

发表于:2019-01-12 / 阅读(116) / 评论(0) 分类 2016年VOA慢速英语(三)月

By Zulima Palacio Washington 26 September 2007 The organization that runs George Washington's estate near Washington, D.C. opened to the public a typical slave cabin from the 18th century. Most of those present at the dedication say the tiny house br

发表于:2019-01-13 / 阅读(168) / 评论(0) 分类 2007年VOA标准英语(九月)

By Jim Malone Washington 02 January 2007 State Funeral service at the Washington National Cathedral for former President Gerald R. Ford, 2 Jan. 2007 Official Washington bid farewell to former President Gerald Ford on Tuesday. Mr. Ford, the 38th pres

发表于:2019-01-13 / 阅读(215) / 评论(0) 分类 2007年VOA标准英语(一月)

Russian President Dmitri Medvedev has signed decrees granting formal recognition to the Georgian breakaway regions of Abkhazia and South Ossetia. But VOA Moscow correspondent Peter Fedynsky reports analysts say the move could promote separatism in R

发表于:2019-01-13 / 阅读(118) / 评论(0) 分类 VOA标准英语2008年(八月)

The United Nations is appealing for more than $58.5 million to provide emergency assistance to tens of thousands of people affected by the crisis in Georgia over the next six months. Aid agencies report their biggest problem remains one of access. L

发表于:2019-01-13 / 阅读(146) / 评论(0) 分类 VOA标准英语2008年(八月)

Geophysicist Probes Ocean's Secrets Today, Pitman is a distinguished professor of geophysics at Columbia University, and the recipient of many of his fields most coveted honors. Even though he is now in his 80s, Pitmans animated manner makes it easy

发表于:2019-01-13 / 阅读(328) / 评论(0) 分类 VOA标准英语2012年(一月)

GeographyMeetsSocialMediaonGeosocialSites Theres a well-worn phrase in real estate: location, location, location, meaning that where a property is located, alone, means more than anything else when it comes to assessing its value. But location is get

发表于:2019-01-13 / 阅读(139) / 评论(0) 分类 VOA标准英语2011年(九月)

KELLY MCEVERS, HOST: We're going to hear about something called geofencing. You might know about it. But if you don't, it's wireless technology that tracks mobile devices entering and exiting a specific area. Up to this point, it's mostly been used b

发表于:2019-01-16 / 阅读(186) / 评论(0) 分类 2017年NPR美国国家公共电台7月

U.S. President George Bush says Russia must not lay claim to the breakaway Georgian republics of South Ossetia and Abkhazia. VOA White House Correspondent Scott Stearns reports, Mr. Bush says all Russia forces must leave Georgia. Russia says there i

发表于:2019-02-06 / 阅读(134) / 评论(0) 分类 VOA标准英语2008年(八月)

Compston's machine allowed such rocks to be dated with unparalleled precision. 康普斯森的仪器能以无与伦比的精确度测定这些岩石的年代。 The prototype SHRIMP was built and machined in the Earth Science department's own worksho

发表于:2019-02-17 / 阅读(127) / 评论(0) 分类 万物简史
学英语单词
.fo
A phase
acquire knowledge
Aenus
Airmouse
ammonium paratungstate
anterior tibial artery
aravida
aringoes
aspidimerus esakii
astatic regulator
Atlantic Ocean
background illumination
be doomed
be irritated against sb
belt and braces
between hell and high water
branch of a circuit
cannel-bone
carnavalet
cement mortar vibrating table
census distribution
cinnamomin
coefficient of velocity fluctuation
Conrad IV
CPAI
crystalline rate
deux-chevaux
dudden
Electronic Wallet
Faber, Mt.
feliks
ground-emitter location and identification system
helicitic texture
hop trefoil
kamaishilite
kilbourns
Kohlbergian
korector
lig. sternocostale intraarticulare
looj
luminous flux curve of standard lamp
maccarone
machine reel
mandred
medical advice
melipramine
minimum requirements
miserite
naphthalene polychloride
navicular arthritis
neurothekeomas
oath of allegiance
Oissel
Oxalobacteraceae
participa
Paspalidium
patent and trademark office
Pearwort
pelletising
personal asset
phasor induction log
pole-dancers
polycistrooonic transcript
poulantzas
protonolysis
punching device
put-through
ragea
redoxtitration
renal vascular hypertension
RPCF
sauchie
Schiltach
Seessel's pocket
shortrun production
show sb over sth
slip flask mold
St-Brieux
stepson
sumiswalds
suspended coil galvanometer
switch the feed
tapirine
tapping ratio
teutonicuss
theory of expertise
throw cushion
tocopheryl
trial supervision
tritium
uraechoides taomeiae
ureterotrigono-enterostomy
vagina musculi recti abdodminis
Vaimauga Dist.
varicella zoster viruss
Vestur-Bardhastrandarsýsla
vexillifer
Webster L.
wheel horses
white clip circuit
work center variable capacity summary