Scientific American's Sixty

Donald Trump hasn't been running the most traditional campaign. And it's not just the unfiltered tweets. He's neglecting campaigning full stop. Thomas Wood, an assistant professor of political science at Ohio State. He's had about half as many public

发表于:2018-12-24 / 阅读(279) / 评论(0) 分类 未知分类

Small carnivoreslike foxes or raccoons or badgersare themselves prey for larger predatorslike wolves. So they spend time hiding instead of hunting. This influence that big predators have on their ecosystem is called a landscape of fear. But humans ar

发表于:2018-12-24 / 阅读(199) / 评论(0) 分类 未知分类

Air pollution outside is easy to spot, hanging over the city, or sputtering from a tailpipe. But there's lot of indoor air pollution, too, even if it's not as obvious. It's caused by volatile organic compounds, or VOCs. They can come from building ma

发表于:2018-12-24 / 阅读(188) / 评论(0) 分类 未知分类

Last week, tens of thousands of gallons of sewage gushed into urban streams in Baltimore, because of leaky pipes and flooding rains. And when that happens, it's not just organic matter and microbes that get flushed into aquatic habitats. It's drug re

发表于:2018-12-24 / 阅读(133) / 评论(0) 分类 未知分类

Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文,请发贴到 听力原文收集区 ,您将会获得10到30积分的奖励! Thank you!

发表于:2018-12-24 / 阅读(131) / 评论(0) 分类 未知分类

Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文,请发贴到 听力原文收集区 ,您将会获得10到30积分的奖励! Thank you!

发表于:2018-12-24 / 阅读(122) / 评论(0) 分类 未知分类

Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文,请发贴到 听力原文收集区 ,您将会获得10到30积分的奖励! Thank you!

发表于:2018-12-24 / 阅读(115) / 评论(0) 分类 未知分类

Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文,请发贴到 听力原文收集区 ,您将会获得10到30积分的奖励! Thank you!

发表于:2018-12-24 / 阅读(141) / 评论(0) 分类 未知分类

Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文,请发贴到 听力原文收集区 ,您将会获得10到30积分的奖励! Thank you!

发表于:2018-12-24 / 阅读(137) / 评论(0) 分类 未知分类

Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文,请发贴到 听力原文收集区 ,您将会获得10到30积分的奖励! Thank you!

发表于:2018-12-24 / 阅读(115) / 评论(0) 分类 未知分类

Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文,请发贴到 听力原文收集区 ,您将会获得10到30积分的奖励! Thank you!

发表于:2018-12-24 / 阅读(120) / 评论(0) 分类 未知分类

Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文,请发贴到 听力原文收集区 ,您将会获得10到30积分的奖励! Thank you!

发表于:2018-12-24 / 阅读(111) / 评论(0) 分类 未知分类

Its easy to see that some plants change from day to nightflowers open and close, and even turn to face the sun. In 1880 Darwin noted that the leaves and seedlings of various plants appeared to engage in nighttime changes that he called sleep. But the

发表于:2018-12-24 / 阅读(161) / 评论(0) 分类 未知分类

Ebola outbreaks before the most recent one have been fairly contained: geographically limited, and just a couple hundred cases. The latest outbreak, though, which started in late 2013 and lasted more than two years, was entirely different. There were

发表于:2018-12-24 / 阅读(137) / 评论(0) 分类 未知分类

As somebody who is part of the executive branch and serving in this role which I can consider to be a great privilege, as director of NIH, I am confident that the convictions that are held by many Americans and by most members of the Congress, that b

发表于:2018-12-24 / 阅读(168) / 评论(0) 分类 未知分类

The last few years have seen numerous widely publicized incidents of civilians, black men in particular, being killed by police. In response, many officers are now required to wear body cameras. The theory is that technology will lessen the likelihoo

发表于:2018-12-24 / 阅读(126) / 评论(0) 分类 未知分类

The way we sample much of the world's oceans, to see what's living down there, is pretty basic: Ask fishermen. Or just stick a net down there, and examine what we catch. Neither method is ideal. Because you basically catch the fish and kill them. Phi

发表于:2018-12-24 / 阅读(145) / 评论(0) 分类 未知分类

Climate change may be partly to blame for the massive die-off of pine trees in the western U.S. But it works the other way, too: forest die-offs can alter the global climate. I like thinking of this as a parallel to something like El Nino. Abigail Sw

发表于:2018-12-24 / 阅读(129) / 评论(0) 分类 未知分类

Your nose may be the first place you think of as a source of mucus. But mucus is a major player in your gut, too. There's antimicrobial peptides and proteins that are present in there. Bacteria live in there and forage on the carbohydrates. And it's

发表于:2018-12-24 / 阅读(146) / 评论(0) 分类 未知分类

The Unnatural World is the title of a new book by former Scientific American environment editor David Biello. The subtitle: The Race to Remake Civilization in Earths Newest Age. And that age has been dubbed the Anthropocenein which humanity (anthro)

发表于:2018-12-24 / 阅读(147) / 评论(0) 分类 未知分类
学英语单词
a bone to gnaw
a gam
acid anthracene brown dyes
ala daglar
analogical design
avalanche chute
bank insolvency
Baume'
blood manure
bonded warefouse
caliginosa
calutrons
cellohexaose
channel burst mode
Chansa
charing load
Christianese
clam-shell brake
cold ulcer
content data
dejmal
depreciation basis
discandying
drive the porcelain bus
duplex pump
efficiency of wheat washing
electric tachnometer
endolymphic
erdles
fast-response time
freefalls
french welt
Freres
furneaux
galactopoiesis
genus icterias
gonococci
grass skirt
grout slope
Gulf Stream
high-rate digestion
homodont
hot waw
ice axes
infracapillary space
JAGC
jewells
Joe Six-pack
kinsale
kraaks
labyrinthodonts
life cycle of swine feeding
macrosplanchnla
made an exhibition of myself
merops ornatus
method of progressive hand
microshock
musculus rectus capitis dorsalis
negotiated market
neural structures
non-selective absorption
noninfective
Ogham Irish
one-niner
piss proud
pleochroic halo
pneumatically controlled loader
positive shedding
principles of unity of command
proadenohypophysis
pussy whipped
reactor power noise
reference method of analysis
roseolae
saw chain filing machine
schneidewind
signal station
single digits
single pan balance
single-point recorder
Sir Paul
smooth muscle layer
Soyalac
stabilizing bulge
tathe
technical objective documents
tetradecanoyl chloride
three-toed
tieline oscillation
towed grader
trichothecin
unbulliable
upstream data
US pint
Uwe
V.
Viola lactiflora
water barrel
water tight vessel
where is it
worry line
yo-heave