复制酶

MARY LOUISE KELLY, HOST: NASA's plucky rover known as Opportunity has been on Mars nearly 15 years - a tad longer than the 90 days it was designed for. It has taken thousands of images. It has helped scientists better understand the red planet. But N

发表于:2018-12-08 / 阅读(134) / 评论(0) 分类 2018年NPR美国国家公共电台11月

This is Scientific Americans 60-Second Science. Im Cynthia Graber. This will just take a minute. Medieval armor certainly looks heavy. And now researchers have demonstrated how the protection might have unwittingly put its wearers at a heavy disadvan

发表于:2018-12-24 / 阅读(187) / 评论(0) 分类 Scientific American(七)月

Kibcob will soon face his first great step on the road to priesthood. He hopes to take part in the most important ceremony of the Ethiopian Orthodox ChurchTimkat, the feast of the Epiphany, celebrating the baptism of Christ. Although Epiphany is cele

发表于:2018-12-26 / 阅读(147) / 评论(0) 分类 自然百科2010年

[00:00.29] 14.The All-Leather, NFL Regulation, 1963 Chicago Bears-Inscribed Football [00:09.34]The year was 1964. The place was Chicago. [00:13.58]A man I worked with had acquired a couple of all-leather, NFL regulation, [00:18.81]1963 Chicago Bears-

发表于:2018-12-26 / 阅读(136) / 评论(0) 分类 温馨夜读II

-Sheldon: What are you doing? 你在干什么? -Leonard: I'm packing up all my collectibles and taking them down o the comic book store to sell. pack up: 打包 collectible:收藏品 我在打包我的收藏品...带到楼下的漫画书店去卖掉

发表于:2019-01-01 / 阅读(149) / 评论(0) 分类 生活大爆炸第一季

Grammar Girl here. Todays topic is the difference between the words historic and historical. A listener, Denise, wants to know if she should say, We sell historic replicas or We sell historical replicas. Was an event a historic occasion or was it a h

发表于:2019-01-02 / 阅读(160) / 评论(0) 分类 英语语法 Grammar Girl

People Remember Historic 1963 March on Washington WASHINGTON Fifty years ago, civil rights leader Rev. Martin Luther King Jr. led a march that changed the lives of all Americans. On August 28, 1963, King delivered his famous I Have a Dream speech to

发表于:2019-01-03 / 阅读(108) / 评论(0) 分类 VOA常速英语2013年(八月)

DOUG JOHNSON: And Im Doug Johnson with People in America in VOA Special English. Today we tell about a young woman named Virginia Patterson Hensley. No one but her family would remember that name. The world remembers her as Patsy Cline. SHIRLEY GRIFF

发表于:2019-01-11 / 阅读(173) / 评论(0) 分类 2011年VOA慢速英语(一)月

PEOPLE IN AMERICA - Robert Frost, 1874-1963: Celebrating National Poetry Month with One of Americas Most Famous Poets STEVE EMBER: I'm Steve Ember. FAITH LAPIDUS: And I'm Faith Lapidus with PEOPLE IN AMERICA in VOA Special English. Today, we begin th

发表于:2019-01-12 / 阅读(333) / 评论(0) 分类 2011年VOA慢速英语(四)月

PEOPLE IN AMERICA - Robert Frost, 1874-1963: Most Americans Can Quote His Poems STEVE EMBER: I'm Steve Ember. FAITH LAPIDUS: And I'm Faith Lapidus with PEOPLE IN AMERICA in VOA Special English. Today we finish the story of Robert Frost and his poetry

发表于:2019-01-12 / 阅读(195) / 评论(0) 分类 2011年VOA慢速英语(四)月

AS IT IS 2016-07-08 Noahs Ark Theme Park Opens in Kentucky 诺亚方舟主题公园在肯塔基州开幕 A large model of the boat that many people believe saved Noah, his family and animals from the Biblical flood officially opened Thursday. The boa

发表于:2019-01-12 / 阅读(145) / 评论(0) 分类 2016年VOA慢速英语(七)月

International Students Find Ways to Pay High Tuition 留美学生为支付高昂的学费各显神通 When Marine Hayashi first arrived at American University in 2013, she was a little afraid. I got homesick and I cried almost every day when I was in

发表于:2019-01-12 / 阅读(136) / 评论(0) 分类 2015年VOA慢速英语(十一)月

Safe House Provided Security for Martin Luther King During 1963 Campaign 1963年马丁路德金的藏身之所 BIRMINGHAM, ALABAMA President Barack Obama will lead the nation in paying tribute to the late civil rights leader Martin Luther King Jr. on

发表于:2019-01-14 / 阅读(130) / 评论(0) 分类 VOA标准英语2014年(一月)

STEVE INSKEEP, HOST: NPR's Invisibilia is back for a third season. The show about the unseen forces that shape human behavior is taking a look at concepts like reality, identity, emotion and how those concepts shape our experience - sounds kind of ab

发表于:2019-01-17 / 阅读(142) / 评论(0) 分类 2017年NPR美国国家公共电台6月

Beginners. There is an invasion going on in our house. It started out as an unnoticed thing, but it has grown to huge proportions. Every room of my house is affected. Every corner shows a sign of this invasion. Even my friends and neighbors have ment

发表于:2019-01-28 / 阅读(123) / 评论(0) 分类 英语博客 A cup of English

we sport exact replicas of each others ears. Im taller and more muscular and shave. Hes slender and ungainly and is all knees and elbows. I reach up and pull my hair back from my face, show him the scar from the accident. Unconsciously, he mimics my

发表于:2019-01-29 / 阅读(128) / 评论(0) 分类 时间旅行者的妻子

According to the Daily Mail of September 8, Graham Lane, a 65-year-old electrician in Worcester, UK, kept enough weapons in his modest home to start a real small war. On September 7, nine police vehicles arrived at Lane's home, followed by the Army b

发表于:2019-02-04 / 阅读(137) / 评论(0) 分类 实用英语

法律修订赶不上3D打印的发展 WASHINGTON As prices of 3D printers continue to fall, experts are increasingly calling for reconsideration of copyright laws that protect the owners of patents and designs. However, they also warn that overreach

发表于:2019-02-05 / 阅读(171) / 评论(0) 分类 英语新闻

Smithsonian Museum opens new window on human origins Rosanne Skirble | Washington, DC 02 April 2010 Photo: Chip Clark, Jim DiLoreto, Don Hurlbert, Smithsonian Institution Five fossil human skulls show how the shape of the face and braincase of early

发表于:2019-02-12 / 阅读(153) / 评论(0) 分类 VOA标准英语2010年(四)月

This weekend, the Getty Center, one of the most famous museums in the U.S., will open a new exhibit years in the making. The Cave Temples of Dunhuang: Buddhist Art on Chinas Silk Road features incredible full-size replicas of ancient painted caves fo

发表于:2019-02-25 / 阅读(180) / 评论(0) 分类 cctv9英语新闻2016年
学英语单词
a hook
account categories
aerial spur box
airwards
all-up round
amnion raphe
antirishons
apple-reds
balanced crystal mixer
building survey
Burkesville
Chanel, Coco
Claripex
clintonville
coffee shops
common-emitters
contact fault due to increased contact-circuit resistance
crakle
crest over the weir
cutaneous lymphogranuloma
daily load fluctuation
data base mapping
dipyrrolizines
drowned nappe
dyclesium
emergency electric system
entercommon
excoes
faceworker
fibrosing pancreatitis
finishing barrel
Flame virus
Frauenlob
front dump-type ingot buggy
full pension
H.O.D.
hamell
harholdt
heteromorphous combination
horsewomanship
hunting horse
hydrodiffusion
I'm afraid not
intencin
isochor(e)
keep account
leiphemia
liaison tunnel
MacNeven
man machine integration
microbasis for macroeconomic regulation
mock romaine fabric
multiple location
multipurpose computer
mumps vaccine
night-bat
night-sides
nombles
nooner
nowinski
olitory
olwen
oval cross-section
pathotypings
peripheral nervous system(pns)
photochemical fuel cell
piling it on
positive translation
power semiconductor devices
pressure sensitive adhesive tape
pseudodiaptomus marinus
pseudopolyp of colon
public transits
radiocobal
rampling
rational convexity
reference diameter of worm
remaining amount
resident government bodies
retrieval result
Royal Mile
RTOS
ryegonovin
sanodiazine
seger cones
sercambis
shallow water
slate-greys
soft-centred
Solenogastres
somascope
sore loser
static sea cock
sulphur trioxide
sympathetcoma
Tarui disease
tetraethylene-glycol
thermal shift
thumbikins
topocentric aberration
Tuberculum dorsale
wate