碳酸盐沉积物

This is Scientific America's 60-Second Science, I'm Cynthia Graber. This'll just take a minute. Its hot to research life in extreme environments. There are organisms that thrive in boiling hot thermal vents and in toxic stews. These extremophiles, as

发表于:2018-12-24 / 阅读(68) / 评论(0) 分类 Scientific American(五)月

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Theres a Native American site in Ohio that appeared to be a fort. But recent discoveries by archaeologists at the University of Cincinnati show thats n

发表于:2018-12-24 / 阅读(92) / 评论(0) 分类 Scientific American(九)月

Roughly 1,000 years ago, Europe enjoyed several centuries of balmier average temperatures. Dubbed the Medieval Warm Period, it was the last time before the present that agriculture could flourish in Greenland. This era also provided fodder for countl

发表于:2018-12-24 / 阅读(85) / 评论(0) 分类 Scientific American(十一)月

(MA) Look at our topographical map and you'll see that the middle third of the North American continent --- from the Rocky Mountains almost to the Mississippi River --- is pretty flat. This is the Great Plains. This kind of area is sometimes called

发表于:2018-12-30 / 阅读(53) / 评论(0) 分类 托福听力短文

About 110 million years ago, a large plant-eating dinosaur covered with sharp points walked the land. Called a nodosaur, it is now the best example of its kind ever found. This new species of dinosaur is being called a one-in-a-billion discovery. Rec

发表于:2019-01-02 / 阅读(98) / 评论(0) 分类 2017年VOA慢速英语(五)月

This is Scientific American's 60-Second Science, I'm Christie Nicholson. Got a minute? During the last ice age our problem was too little carbon. Unlike today where too much carbon is causing global warming. Past glacial ages occurred partly because

发表于:2019-01-08 / 阅读(89) / 评论(0) 分类 Scientific American(七)月

This is Scientific American's 60-Second Science. I'm Adam Hinterthuer. Got a minute? Farmers fertilize their fields to get the maximum meal from their crops. But the effects of these loads of nitrogen and phosphorous extend beyond the field and past

发表于:2019-01-08 / 阅读(95) / 评论(0) 分类 Scientific American(三)月

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This'll just take a minute. As scientists delve deeper beneath the oceans surface, they find bizarre creatures that have adapted to harsh and extreme environments. Now comes a new o

发表于:2019-01-08 / 阅读(89) / 评论(0) 分类 Scientific American(四)月

Lake Sediment Could Better Date Ancient Finds Radiocarbon dating is the best-known and most widely used method to determine the age of organic material, such as bone or wood or plant matter. All such material contains radioactive carbon atoms, known

发表于:2019-01-14 / 阅读(74) / 评论(0) 分类 VOA标准英语2012年(十月)

What then of manned space exploration? 那载人的空间探索呢? The government recently announced plans to return to the moon by 2024. 美国政府最近宣布了2024重返月球的计划。 The successful conclusion of that mission will result

发表于:2019-01-18 / 阅读(63) / 评论(0) 分类 TED演讲商业篇

The 9/11 terrorist attack in New York not only killed people. It also killed local businesses, too, as many residents and companies moved out of the devastated area. 10 years on things are finally recovering. One Chinese restaurant has been part of t

发表于:2019-01-19 / 阅读(87) / 评论(0) 分类 世界各地新闻集锦

From the CNN Center in Atlanta, I'm Catherine Callaway. So glad you are checking in with us now! Here is a look at what's happening NOW IN THE NEWS. Senator Hillary Clinton pulled off a campaign saving comeback last night. Her backers saw Texas and

发表于:2019-01-26 / 阅读(117) / 评论(0) 分类 商业报道2008年(三)月

The geology of the planet 地球的地质情况 Welcome to the Anthropocene 欢迎来到人类纪 Humans have changed the way the world works. Now they have to change the way they think about it, too 人类改变了世界运行方式,现在,人类不

发表于:2019-01-26 / 阅读(110) / 评论(0) 分类 经济学人综合

Today some of Sprigg's original Ediacaran specimens, along with many of the other fifteen hundred specimens that have been found throughout the Flinders Range since that time, 今天,斯普里格的埃迪亚卡拉标本原件,与自那以后在整个

发表于:2019-01-29 / 阅读(90) / 评论(0) 分类 万物简史

The first human inhabitants(居民 ) of North America settled at least 2,500 years earlier than the people previously identified as the first Americans. So say archaeologists, who have unearthed a trove of stone artifacts belonging to the early A

发表于:2019-01-31 / 阅读(57) / 评论(0) 分类 英语新闻

CANBERRA, Oct. 14 (Xinhua) -- Australian scientists have made the alarming discovery that sea levels have risen more in the past century than at any other comparable period in the past 6,000 years. Researchers from the Australian National University

发表于:2019-02-06 / 阅读(81) / 评论(0) 分类 英语新闻

首先,我建议同学们不要上完辅导班就去参加考试。虽有趁热打铁之说,但是我相信绝大部分同学在上课期间已经把大部分的精力用于听讲和记笔记了,回家之后基本上就直奔安乐窝了。能够

发表于:2019-02-14 / 阅读(96) / 评论(0) 分类 雅思英语

Saying Good-bye to Cambridge Again --by Xu Zhimo 再别康桥 徐志摩 Very quietly I take my leave As quietly as I came here; Quietly I wave good-bye To the rosy clouds in the western sky. The golden willows by the riverside Are young brides in the

发表于:2019-02-18 / 阅读(103) / 评论(0) 分类 阅读空间

世界本没有长难句,修饰成分多了,便有了长难句。 阅读速度大部分来于短时间内理解长难句的能力。 大家在看长难句的时候,多思考,一个句子为什么这么长,常见的修饰成分到底有哪些?

发表于:2019-02-18 / 阅读(100) / 评论(0) 分类 托福英语

日常生活中,意外伤害很难避免。如果我们不及时救治或者操作不当的话,很可能会对自身或者他人的身体造成伤害,所以,掌握一些急救常识非常必要。下面我们来看一段关于学习急救的对

发表于:2019-02-26 / 阅读(106) / 评论(0) 分类 英语口语
学英语单词
accessible address space
administration rules
Akordat
al mukalla
allosteric ligand
anapophysial
autonymic
aviation adviser
Ayang
baloon
basaltine
caryoclastic
caters
cationic catalyst
chockers
chronophysiological
completa
condensed phosphoric acid
curdlan
decerning
Ernst,Paul
Erythronium japonicum
expand-type air filter
five-gallons
fixed stand
flight mechanics
function property
gascn
generable
glactowaldenase
gramarie
guide bar unit
guiding shoe
historical origin
hydrated tower
isoclasite(isoclase)
Ji-tsai
Karpeto
Kjeldahl's tests
Kocherezhky
liberal state
long rang planning
machine tool of building block type
machinery equipment
magnetic field component
mascolo
membrana cricothyreoidea
membranae statoconiorum macularum
middle of life(MOL)
nom
nubiola
off one's chump
orbit keeping
other-total
Petro-forge
poultry processing
practical subjects
primary operating system
production decline curve method
pseudopodia
pterygopalatine nerve
quantized interaction
railroad network
reaction isotherm
red heat temperature
reflected foehn
regular solution model
Rosaceae
rynn
schisandrae fructus
scroll elevator
selfloop
short of hands
sing-in
smotheringly
speculation fever
spread spectrum technique
square-loop core
staggered seat
static lubrication
sulfoacid
supersonic particle sizer
supplementary credit facility
swedish irons
talent spotter
tasseographers
thermal junction
tongue of the trump
tuber alveolare
turns up
ubf
udhs
uncontainable
underplate
unitary character
utriculate
varnity
very-high-speed integrated circuit
Vicia ohwiana
waipa
white hemlock
zebrine