飞沫传播

Robotics, 3-D Printing, Drones Lead 2015 Tech Innovations The waning years advances in computer hardware and software, mechanical devices, sensors and artificial intelligence brought the world another step closer to the robotic future. Electric cars

发表于:2018-11-29 / 阅读(174) / 评论(0) 分类 VOA标准英语2015年(十二月)

9) The number of violent acts on televisions in the past years __ has increased __ (increase) from about 19 to 27 per hour. (15A 2004 上 ) 10) Your mind _ will keep ___ (keep) up with your reading sp

发表于:2018-12-01 / 阅读(198) / 评论(0) 分类 自考英语(一)78讲

Dialogue 4 BUYING A SECOND-HAND CAR Laurance- What kind of a car do you have? Soony--- An old one. Laurance- I know it's old, but what make is it? Soony-- - It's a Chevrolet. Why do you ask? You going

发表于:2018-12-03 / 阅读(136) / 评论(0) 分类 听力每日练习补充

Sneeze and cough particles form a cloud whose turbulence pulls in surrounding air, which allows the goop to maintain buoyancy and move farther than expected. Cynthia Graber reports. Gordon: When you have to sneeze or cough, do it into the bend of you

发表于:2019-01-02 / 阅读(138) / 评论(0) 分类 英伦广角

坚持不懈,直到成功。 我们每天的奋斗就像对参天大树的一次砍击,头几刀可能了无痕迹。每一击看似微不足道,然而,累积起来,巨树终会倒下。这恰

发表于:2019-01-03 / 阅读(129) / 评论(0) 分类 四六级词汇与结构练习

This is Scientific Americans' 60-Second Science. I'm Chelsea Wald. Got a minute? Vinaigrette dressing: when you shake it little vinegar droplets scatter through the oil, but when you put it down, the droplets merge and the dressing separates. That's

发表于:2019-01-08 / 阅读(118) / 评论(0) 分类 Scientific American(二)月

Cavers Explore Mysterious Hidden Wonders Caves have a subconscious hold on our imaginations - for our ancestors, they were not just shelter from the elements but also symbols of the womb, gateways to the underworld, places of wonder and mystery. Not

发表于:2019-01-09 / 阅读(111) / 评论(0) 分类 VOA标准英语2011年(八月)

This is the VOA Special English Health Report. Scientists continue to look for ways to deal with the deadly form of bird flu virus. Medical workers care for a bird flu patient in Medan, Indonesia, last year Researchers in Singapore, for example, hav

发表于:2019-01-11 / 阅读(116) / 评论(0) 分类 VOA慢速英语2007年(十)月

Dallas Attacks West Nile Virus by Land, Air The aerial and ground fumigation programs are blanketing around 1,400 square kilometers of the county, but don't target all mosquitoes. Laura McGowan, who works with Clarke, the company contracted to carry

发表于:2019-01-13 / 阅读(101) / 评论(0) 分类 VOA标准英语2012年(八月)

Ben Carter Powdered material called dry water, could provide a new way to store carbon dioxide in an effort to fight global warming. Dry water looks a lot like fine white sand, which isn't surprising since what makes it dry is that each tiny water dr

发表于:2019-01-14 / 阅读(136) / 评论(0) 分类 VOA标准英语2010年(九)月

China has long depended on coal-burning power plants to fuel its explosive growth over the past three decades. As a result, air pollution has risen to alarming levels in central and eastern regions. Policymakers have been working hard to shift the co

发表于:2019-01-19 / 阅读(181) / 评论(0) 分类 2017CRI中国国际广播电台

Fact: liquid water is heavier than air. Fact: clouds, which consist of water droplets and ice crystals, seem to hover in the air. One final fact: the water droplets in a typical cloud together weigh many tons. Which raises a question: how do clouds s

发表于:2019-01-22 / 阅读(208) / 评论(0) 分类 英语时差8,16

HARI SREENIVASAN: The U.S. Food and Drug Administration today asked blood centers in two in Florida counties to suspend blood donations until each unit can be screened for the Zika virus. This comes as state health officials investigate four non-trav

发表于:2019-01-27 / 阅读(123) / 评论(0) 分类 PBS访谈健康系列

一次咳嗽会产生2万个病毒 The next time you cough or sneeze, there is good reason to cover your mouth. As many as 20,000 viruses are expelled in an average cough, which may be sufficient to infect many people - particularly those who are not

发表于:2019-02-05 / 阅读(140) / 评论(0) 分类 实用英语

每年的12月1日是世界艾滋病日,今年中国的宣传主题是合力抗艾,共担责任,共享未来。 请看相关报道: Six out of every 10,000 people in China may be infected with HIV/AIDS, according to official figures revealed

发表于:2019-02-11 / 阅读(103) / 评论(0) 分类 英语口语

Voice 1 Thank you for joining us for todays Spotlight program. Im Liz Waid. Voice 2 And Im Rebekah Schipper. Spotlight uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice

发表于:2019-02-14 / 阅读(267) / 评论(0) 分类 环球英语 Spotlight

Metal, heal thyself 金属,自己愈合吧 Materials science: Researchers have devised an ingenious way for the damaged surfaces of metals to repair themselves when they come to harm 材料科学:研究人员构想出了一种新颖独特的方法,

发表于:2019-02-17 / 阅读(133) / 评论(0) 分类 经济学人综合

Glossary for Telecomunications This glossary helps explain some of the acronyms and technical phrases Bluetooth A short-range wireless technology designed to allow connection of portable devices in a wire-free manner. For example connection of a wire

发表于:2019-02-18 / 阅读(143) / 评论(0) 分类 实用英语

What's more, I've detected those falling and rising currents that make up the ocean's true breathing. 此外,我又注意过那些由上而下和由下而上的水流,形成真正的海洋呼吸作用。 I've seen a molecule of salt water heat up

发表于:2019-02-25 / 阅读(98) / 评论(0) 分类 《海底两万里》中英双语有声读物

They absorb the marine salts, they assimilate the solid elements in the water, 它们吸收了海中的盐,消化了水中的固体物质, and since they create coral and madrepores, they're the true builders of limestone continents! 它们是真正

发表于:2019-02-25 / 阅读(104) / 评论(0) 分类 《海底两万里》中英双语有声读物
学英语单词
2-bromo-5-nitro-p-toluidine
ADCON
affusing
amen curlers
atazanavir
Ball's point
ben kingsley
bond test of coating
brancher glycogen storage disease
broading
bromated
camermante
capacity calculation
capital of Montana
categorisations
chromatid tetrad
churn ... out
cockalorums
common fault
compensated pyrheliometer
computational processor
DEC (distance echo correction)
degag? en tournant
dilophotis atricollis
dozens of
draw dun out from the mire
ethacrynate
fiberglassed
forward edge of battle area
full cost system
fungusproof material
glycerin tribenzoate
Gotimycin
grimsley
gulphe
heat transmission coefficient
hematoxylin-eosin-azure
heptaglyme
industrial light
innsbrucks
International Maritime Pilots association
intrabasinal rock
inventory rating
ionospheric tide
Jacobinism
kc-lo
Khuabem
krokidolite
laughing-stocks
lie heavy at someone's heart
light-activated switch
local police
lophiodes endoi
low-water-loss cement
Maloyaroslavetskiy Rayon
mercury alloy
mercury teleswitch
misaiming
molar concentration
mosess
Mouse I.
munida crassa
nervi cerebrales
non vult contendere
non-slip point
ootype
overbleached
oxytropis ochrantha turca
phosphoro-imidate
picture geometry fault
Polygonatum macropodium Turn.
priming coat paint
projected-moving pointer
protective cell
redundancy testing
rental cars
rentor
repair method
sargasso weed
settlement currency
shaking shoot
size mark
softened lead
solution heattreated condition
son of the spigot
Sophora flavescens
spudis
square cross section
sudden deaths
tent pin
thermal transport formula
tools of trade
ultimate breaking load
unicellular hair
unprecedentedly
utility index
valasek
voltage maintenance
wolfcamp age
Zohar