分子表面能

This is Scientific American's 60-Second Science, I am Steve Mirsky, got a minute? You are pulling the tape off the roll and it starts to tear, or you are moving wallpaper and it refuses to strip off in strips or in what may be the most infuriating ca

发表于:2018-12-24 / 阅读(82) / 评论(0) 分类 Scientific American(三)月

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Just when you thought youd heard everything, scientists have found that the reason you can hear everythingincluding things that are very quietis because

发表于:2018-12-24 / 阅读(75) / 评论(0) 分类 Scientific American(四)月

(Woman) Today I want to talk about the Earth's last major climatic shift, at the end of the last ice age. But first, let's back up a moment and review what we know about climatic change in general. First, we defined climate as consistent patterns of

发表于:2018-12-30 / 阅读(122) / 评论(0) 分类 托福听力短文

Create Your Own Moon Craters! What makes science really fun is when you get to do things yourself, so today were going to be making moon craters. Theyre the roundish blast-marks left on the moons surface by ancient meteorites. The moons surface is co

发表于:2018-12-31 / 阅读(48) / 评论(0) 分类 英语听力文摘 English Digest

How Does Ice Cool Drinks? Heres something we tend to take for granted: drop a few ice cubes into a glass of water at room temperature, and in a few minutes the water will cool. How does this work? Heat is a measure of molecular activity: the faster a

发表于:2018-12-31 / 阅读(51) / 评论(0) 分类 英语听力文摘 English Digest

Time for M.I.T.s Clean Energy Prize. The annual competition gives teams of university students a chance to compete for $200,000 to kick-start their new clean energy business. One finalist designed a compression technology for natural gas wells that w

发表于:2019-01-02 / 阅读(297) / 评论(0) 分类 60秒科学

By Paul Sisco Washington 13 July 2007 NASA scientists have unveiled details of the space agency's plans to pierce the icy surface of Mars, near its north pole. The mission is designed to find evidence of water or life on the red planet. VOA's Paul S

发表于:2019-01-07 / 阅读(108) / 评论(0) 分类 2007年VOA标准英语(七月)

The 2009 Nobel Prize in Chemistry goes to Venkatraman Ramakrishnan of the MRC Laboratory of Molecular Biology in England, Yale Universitys Thomas Steitz, and Ada Yonath of the Weizmann Institute of Science in Israel for their studies of the ribosome.

发表于:2019-01-08 / 阅读(102) / 评论(0) 分类 Scientific American(十)月

Die-hard advocates of alternate energy might fantasize about cars that could one day run on water. But scientists in India have gone a step further. Theyve mathematically modeled an engine that should allow a motorcycle to run on aircompressed air, t

发表于:2019-01-08 / 阅读(83) / 评论(0) 分类 Scientific American(七)月

Kenya Moves Full-Steam Ahead on Geothermal Production Kenya is expanding plans to become one of the worlds top geothermal power producers with the start of explorations at a site called Menengai. The government is also aiming to make geothermal Kenya

发表于:2019-01-13 / 阅读(78) / 评论(0) 分类 VOA标准英语2011年(十一月)

Last October, a NASA rocket, traveling at a speed of 9,000 kilometers per hour, smashed into a dark crater on the moon's south pole. Upon impact, the Centaur rocket kicked up a cloud of debris and elements from the moon's surface, creating a so-calle

发表于:2019-01-14 / 阅读(55) / 评论(0) 分类 VOA标准英语2010年(十)月

ROBERT SIEGEL, HOST: Adam Frank usually has his head in the sky. He's an astrophysicist. It's an occupational hazard. Right now, though, he is dazzled by the universe of green right here on Earth. ADAM FRANK, BYLINE: Now that we're well past the star

发表于:2019-01-17 / 阅读(55) / 评论(0) 分类 2017年NPR美国国家公共电台6月

This years Nobel Prize in Chemistry is about the worlds smallest machines. G?ran Hansson, secretary general of the Royal Swedish Academy of Sciences, earlier this morning. The Royal Swedish Academy of Sciences has decided to award the 2016 Nobel Priz

发表于:2019-01-17 / 阅读(122) / 评论(0) 分类 2016年Scientific American(十)月

BERLIN, April 25 (Xinhua) -- A study recently published in the journal Nature Chemical Biology opens up new avenues in biohydrogen research, the Technical University of Berlin (TU Berlin) said on Friday. Scientists at the TU Berlin succeeded in expla

发表于:2019-01-26 / 阅读(61) / 评论(0) 分类 英语新闻

This is Xaero - a vertical take-off and landing vehicle being developed by Masten Space Systems. The California start-up hopes the rocket will eventually carry pay-loads for NASA to altitudes of up to 30 kilometres, mainly to collect atmospheric data

发表于:2019-02-03 / 阅读(59) / 评论(0) 分类 英语新闻视频

2006职称英语考试模全真拟试题理工类B级(二) 第一部分:词汇选择(第1-15题,每题1分,共15分) 下面共有15句子,每个句子均有一个词或短语划有底横

发表于:2019-02-07 / 阅读(75) / 评论(0) 分类 实用英语

BEIJING, May 24 (Xinhuanet) -- Scientists revealed for the first time the molecular structure of proteins, which enables bacteria to transfer electrical charges, according to a new study. The revelation was published in Proceedings of the National Ac

发表于:2019-02-07 / 阅读(71) / 评论(0) 分类 英语新闻

如今,高端大气上档次已经成为众人耳熟能详的网络用语,凭借其无与伦比的受欢迎度,高端大气上档次一度位居十大网络用语的榜首。这句让无数互联网迷们捶足顿胸的潮流时尚用语,到底

发表于:2019-02-08 / 阅读(82) / 评论(0) 分类 英语口语

As altitude increases, atmospheric pressure decreases. This is due to Earth's gravitational pull on the air molecules in the atmosphere. The closer to the Earth's surface the stronger the force exerted on these molecules. 随着高度上升,大气压

发表于:2019-02-22 / 阅读(62) / 评论(0) 分类 留美老师带你每日说英文

16.The early railroads were........the existing arteries of transportation: roads,turnpikes, canals,and other waterways. A.those short lines connected B.short lines that connected C.connected by short lines D.short connecting lines 答对率:50% 答案

发表于:2019-03-12 / 阅读(136) / 评论(0) 分类 托福英语
学英语单词
2-Chloro-3-nitropyridine
adaptometers
air classifier
ampoule
arch invert
automatic exception
azza
Barcoo vomit
basis contract
bellydance
benightmare
bioshock
birled
break someone's balls
break-up value
bribery crime
built - in redundancy
car building
cash insurance
Chinese water pine
cimicifuga cordifolia pursh. heart-leaved snakeroot
clest
cornerload test
cube corner retroreflector
dacisteine
Darnley Lord Henry Stewart/Stuart
delegation of authority by type of work
Emperor Napoleon III
exterior coating
Ficker's dianosticum
filled capacity
fischer-dieskau
fishtail bits
forgive for
French leave
gosol
grimsby (great grimsby)
Hamersville
horizontal bed sewing machine
humation
hydroxamino
ibn-Roshd
Isovue-200
Jembrana
jiquis
Kensington Gore
Khenchela
leper lilies
Lexington Park
literature survey
lueshite
luxembourg francs
mathfest
Mephenterminum
methylglycocyamine
minimum limit of size
monorubidium
mud-flush system
nanocaps
Nechanice
north-coast
occupied frequency band
officinale
oil-immersed air-blast cooling
Ol. oliv.
Olfen
oral aperture
overwintering migration
Pargeter
phagocytable
PLSA
porimes
post-mortem dump
pre-flight adaptation
problem-solving method
pull the wool over someone's eyes
quick help
reefer space
reexpressions
renza
riparian state
rodion
Santiago Astata
saturation constraint
section of construction project
Shek Pik Reservoir
shoulder knot
showshoeing
smoked spectacles
socialist legal system
spinae ventosa
Stewart County
tetraspan
thorium carbonate
tuberodties of ischium
turns insulation
unfinished businesses
Universalist Unitarians
vacuum leak hunting
vintages
wind break fence
yiannis