[网络] 柴油中的水和沉积物

But even if there had been water, life doesn't start overnight. Even a simple microbe is the product of complex chemical systems that take millions of years to evolve. Had the water lasted long enough

发表于:2018-12-07 / 阅读(74) / 评论(0) 分类 火星生命

Rice had seen the same thing in Iceland, one of the few places on Earth with similarities to Mars. It too is extremely cold, and most of the water is frozen into glaciers. And also like Mars, buried u

发表于:2018-12-07 / 阅读(86) / 评论(0) 分类 火星生命

Scientists Discover New Animal 科学家发现新的物种 From VOA Learning English, this is SCIENCE IN THE NEWS. Im June Simms. And Im Bob Doughty. Today we tell about a new animal species native to South America. We tell how agricultural chemical

发表于:2018-12-16 / 阅读(55) / 评论(0) 分类 2013年VOA慢速英语(八)月

Great Barrier Reef Choking on Pollutants 大堡礁遭遇前所未有的污染 Attempts to protect the Great Barrier Reef are failing. A report released Monday by the government in Australia says water quality in the Great Barrier Reef is far below wh

发表于:2018-12-16 / 阅读(59) / 评论(0) 分类 2015年VOA慢速英语(十)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(94) / 评论(0) 分类 Scientific American(九)月

What was around the bend in rivers hundreds of millions of years ago? Its a trick questionbecause there werent any bends. Ancient rivers were typically just wide, sheetlike flows of water. New reports in the journals Geology and Earth-Science Reviews

发表于:2018-12-24 / 阅读(70) / 评论(0) 分类 Scientific American(一)月

(WA) One reason oceanographers analyze the sediment on the ocean floor is to see how long-terms changes in Earth's temperature have affected the depth of the ocean. By analyzing the remains of sea animals in old layers of ocean sediment, oceanograph

发表于:2018-12-30 / 阅读(55) / 评论(0) 分类 托福听力短文

Mars Rover Finds Evidence of Ancient Sea David McAlary The U.S. space agency NASA says Mars once had a shallow, salty sea that could have supported life. The evidence has come from chemical and physic

发表于:2019-01-04 / 阅读(63) / 评论(0) 分类 VOA2004(上)--各类新闻

It seemed like a good ideabecause rivers and ponds in Bangladesh were contaminated with bacteria, Bangladeshis switched to wells. But soon after, in the early 80s, researchers realized those wells were harming Bangladeshis with a new poisonarsenic. T

发表于:2019-01-08 / 阅读(88) / 评论(0) 分类 Scientific American(十一)月

Many Life Forms Discovered Deep under Antarctic Ice 南极冰层下发现许多形式的生命 Scientists from the United States say they have found fish and other aquatic creatures living under icy waters in Antarctica. They made the announcement af

发表于:2019-01-12 / 阅读(82) / 评论(0) 分类 2015年VOA慢速英语(三)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(79) / 评论(0) 分类 VOA标准英语2012年(十月)

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 setting sun; Their re

发表于:2019-01-19 / 阅读(138) / 评论(0) 分类 阅读空间

BEIJING, March 1 (Xinhuanet) -- A biotechnology(生物技术) company says it can produce diesel using the same ingredients(配制成分) that make grass grow, media reported on Monday. The Massachusetts company Joule Unlimited has created a genetica

发表于:2019-01-20 / 阅读(84) / 评论(0) 分类 英语新闻

German Car Manufacturer Audi Creates Fuel From Air And Water 奥迪用空气和水合成新燃料 Creating an alternative green or carbon neutral fuel to replace gasoline has been the holy grail for scientists for many years. However, while there has

发表于:2019-02-05 / 阅读(65) / 评论(0) 分类 阅读空间

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

21 Life Goes On 第二十一章 生命在前进 It isn't easy to become a fossil. 要变成化石可不容易。 The fate of nearly all living organismsover 99.9 percent of themis to compost down to nothingness. 几乎所有的生物其中的99.9%以上

发表于:2019-02-17 / 阅读(75) / 评论(0) 分类 万物简史

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(105) / 评论(0) 分类 阅读空间

如何在托福阅读中提取句子的主干?这样即抓住了阅读的重点,也节省了阅读时间。有些同学对于分析长难句并不是那么敏感,看到句子简化题可能就会有晕头转向的感觉,在这里给大家讲解一

发表于:2019-02-18 / 阅读(61) / 评论(0) 分类 托福英语

近来在所接触到的考生当中,绝大部分都是准备到海外读语言、预科或是对雅思分数要求不高的准大学留学生。在他们身上都有着一个共同的特点,那就是时间比较紧迫且对雅思分数要求并不

发表于:2019-03-04 / 阅读(110) / 评论(0) 分类 托福英语

Instead of burning coal, oil, or biomass to heat things up, scientists have found that its possible to use solar energy. For example, some experimental facilities use thousands of mirrors to reflect sunlight onto a large plate on a tower, heating it

发表于:2019-03-06 / 阅读(123) / 评论(0) 分类 英语时差8,16
学英语单词
advantage out
amillennialists
armings
automatic threahold
Aveleda
backward-action regulator
Botea
Buttisholz
Byusakan
cairngormstone
chemical economics
cheverel
choice menus
common object model
component nuclear precession magnetometer
congenital amaurosis
crystal controlled
current source for measurement
demandings
diaclases
digital error
disequal
ejector effect
electronic display
eurythmicss
feller-delimber-bucker-buncher
Fer-in-sol
filament switch
Florid-F
heldentenors
high pressure fuel pump
hoky-poky
IADH
Ibadists
initial sensibility
Joeuf
kiddie stroll
leiariuss
Magazine Mountain
malarkey, malarky
mercator cylindrical projection
merchandise valuation
Montechiaro d'Asti
Mudian
mugilogobius abei
multispectral photographic information
musculus protractor pinnae dorsalis
negro
nickel steel
number of repeated impact to breaking
oriental-style
panduriform
Paxton, Joseph
Peraltilla
Polish language
pre-Soviet
pressure drive
pseudo-random process
Puccinellia leiolepis
quality of freight transportation
re import
refined degree
regretably
reserve source of cash
Rundstedt, Karl Rudolf Gerd von
saligine
sandpaintings
Saussurea
screwstock
sdr standard
semiforced
serialisation
serum antitetanicum siccum
silicon steel sheet
sliding-filament model
solvent-recovery system
souster
soviet-eras
speed up gears
spheroides
sportboats
sprocket chain
stenogobius genivittatus
stereoblock
stony uterine mass
storage content
surrebutter
telex booth
temporomalar nerve
terminal equipment types
test of mongolian and tibetan language
thermo-couple pyrometer
three-high bloomer
throat paint
to the best of one's belief
tree farmer
Trombe walls
Tunis.
underfiring gas
visiting nurses
vt (voltage transformer)
wrist roll