吸音纤维板

When Pablo Panda Sandoval made history with 3 home runs in game one of the world series his head was probably buzzing. But when batters in chilly Detroit had the ball not quite right in the next couple of the nets, it will be their hands that buzzing

发表于:2018-12-24 / 阅读(136) / 评论(0) 分类 Scientific American(十)月

This is Scientific American's 60-second Science. I'm Steve Mirsky. Got a minute? Can you name those notes? Probably not. Perhaps one in ten thousand speakers of European languages has perfect pitch - the ability to recognize a note without having hea

发表于:2018-12-24 / 阅读(160) / 评论(0) 分类 Scientific American(五)月

This is Scientific American's 60-second Science. I'm Karen Hopkin. If you ever got picked on in the schoolyard, you might have wished for some sort of superpower, like unbeatable speed or maybe just the ability to completely disappear. Now scientists

发表于:2018-12-24 / 阅读(155) / 评论(0) 分类 Scientific American(五)月

Scientists analyzed around 2,500 of those calls, and found that the second part (sound) is nearly identical in pitch every time from each whale: 16 hertz, or four octaves below middle C. And the slight variations in frequency that do exist are only a

发表于:2019-01-02 / 阅读(171) / 评论(0) 分类 60秒科学

Hybrid cars are good for the environment. But scientists say that they might be bad for pedestrians. Because hybrids are so quiet, it can be hard for walkers to hear them until its too late. Listen to this. [quiet car sound] Thats a Toyota Prius mov

发表于:2019-01-02 / 阅读(206) / 评论(0) 分类 60秒科学

Can you name those notes? Probably notperhaps one in 10,000 speakers of European languages has perfect pitch, the ability to recognize a note without having heard any reference note first. But theres a much better chance you could successfully name

发表于:2019-01-02 / 阅读(172) / 评论(0) 分类 60秒科学

If you ever got picked on in the schoolyard, you might have wished for some sort of superpower: like unbeatable speed or maybe just the ability to completely disappear. Now scientists at the College of Wooster in Ohio say that you might have had a s

发表于:2019-01-02 / 阅读(209) / 评论(0) 分类 60秒科学

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Every year, scores of manatees are killed by boats in Floridas waters. Their plight is an ecological concern. And everyone from marine biologists to Marg

发表于:2019-01-08 / 阅读(145) / 评论(0) 分类 Scientific American(十一)月

This is Scientific American's 60-second Science. I'm Karen Hopkin. This will just take a minute. Hybrid cars are good for the environment, but scientists say that they might be bad for pedestrians. Because hybrids are so quiet that can be hard for wa

发表于:2019-01-08 / 阅读(157) / 评论(0) 分类 Scientific American(五)月

We humans are pretty good at communicating with sounds other than words. But how much of this is hard-wired, and how much do we pick up from others? To find out, researchers recorded the nonverbal sounds of people born deaf, as they responded to a ra

发表于:2019-01-08 / 阅读(207) / 评论(0) 分类 Scientific American(十一)月

Blue whales off the California coast make calls that, sped up 10 times, sound like (sound of two-part call). The original is a wall-rattling frequency too low for us to hear. Scientists analyzed around 2,500 of those calls, and found that the second

发表于:2019-01-08 / 阅读(138) / 评论(0) 分类 Scientific American(八)月

Country Music Ladies Put Men in Their Place American country music lyrics often describe women as they might appear in mens dreams. This is especially true of songs by many male artists. But the songs by Maddie Marlow and Tae Dye are different. The t

发表于:2019-01-12 / 阅读(165) / 评论(0) 分类 2015年VOA慢速英语(九)月

By Melinda Smith Washington 18 July 2007 We are going to find out about two studies on breast cancer. One studied whether a diet very high in fiber and low in fat could reduce the risk of recurring breast cancer. Another study focused on women with a

发表于:2019-01-12 / 阅读(173) / 评论(0) 分类 2007年VOA标准英语(七月)

Boston Symphony Makes Music in Mountains When Serge Koussevitzy, the Russian-born conductor of the Boston Symphony Orchestra, opened Tanglewood in 1937, he chose an all-Beethoven program, including the Pastorale Symphony. When conductor Christoph von

发表于:2019-01-13 / 阅读(130) / 评论(0) 分类 VOA标准英语2012年(七月)

By Alisha Ryu Nairobi 18 November 2009 A U.S.-flagged container ship which was hijacked by Somali pirates seven months ago has been attacked again off the coast of Somalia. Pirates were unsuccessful in their second attempt to hijack the Maersk Alaba

发表于:2019-01-14 / 阅读(171) / 评论(0) 分类 VOA标准英语2009年(十一月)

RACHEL MARTIN, HOST: The Food and Drug Administration is set to decide soon on a matter that could help you rethink fiber. Yeah, we're talking about fiber. We're told to eat a whole lot more of it. It's good for us, right? But what exactly counts as

发表于:2019-01-16 / 阅读(165) / 评论(0) 分类 2017年NPR美国国家公共电台10月

The Tiangong-2 space lab, though adopting the structure of Tiangong-1 without too many changes in appearance, has been designed to function much stronger than its predecessor. Zhu Congpeng, chief designer of the lab, says they've focused on a variety

发表于:2019-01-19 / 阅读(161) / 评论(0) 分类 2016CRI中国国际广播电台

今天还是要继续讲在大选期间新闻界常用来报道竞选运动的两个习惯用语。今天要说的习惯用语来自《纽约时报》上的同一篇文章,这篇文章报导的是2000年大选的总统候选人戈尔选定参议员利

发表于:2019-02-03 / 阅读(210) / 评论(0) 分类 美国习惯用语

SAN FRANCISCO, June 23 (Xinhua) -- Facebook announced Thursday that Netflix CEO and Chairman Reed Hastings has joined the social network company's board of directors. Hastings, who successfully managed Netflix through an IPO in 2002, is expected to p

发表于:2019-02-03 / 阅读(184) / 评论(0) 分类 英语新闻

通知与确认 Acknowledgments Confirmations 通知对方接到来信Acknowledging receipt of letters1. Dear Mr/Ms,Thank you for your letter No. A-3 of 6th May, offeringus 6 UI-4 Viewdatas. We have passed it on to ourTechnical Department for their c

发表于:2019-02-06 / 阅读(180) / 评论(0) 分类 实用英语
学英语单词
-ide
AARNet
abdominal aortic aneurysm
additivity rule
Agrostemma L.
AOS
arachnologist
average commodity cost
berry blue
Blanquilla, I.
boundary pillar
by feel
Cedar Key
cerium(iii) tungstate
chemabrasion
chloracetiaztion
Codonopsis levicalyx
cold mirror
conditional instability
continuation of class
cooperative sale society
corpuses
cream white
current year's income
day on demurrage
desk-mounted word processor
deuteriochloroform
dip chart
discrete type
door trigger
e-SATA
exponential quantity
fams
faux fur
field-loss relay
find wanting
foldaways
food hamper
foregone conclusions
general partners
generiss
growther
hasanlu
hepatoduodenostomies
immunosmoelectrophoresis
individual naturalization
inductive charger
intelligent drive electronics
Internet mail
jembrana kanoniella
job mobility
kappa slappas
Killiecrankie diamond
Kimaan
link spring
lodgerless
Makubetsu
male-to-female
material process
mischristened
mogilalia
mucklucks
nonmarine origin
nucleolar apparatus
Odivelas, Barragem de
optical sectioning
oscine birds
outdistance
overspilled
pile drawer
plastic size
plungers
post-work
pre-elementation
proportional resolver
racing trim
recceing
reinforced concrete buttressed dam
remit the amount to our bank account
resource commitment
rod burner
simple subroutine
Smyrna fig
soft flow
soil mix plant
solutizer-tannin process
squamous cells
ST_easy-and-difficult_complicated-and-difficult-to-do
stable and equilibrium shoreline
stationary vortex
stick needles in
subapical initial
Timah, Bukit
timmerman
tinhead
top antenna
TURBT
vectored thrust
vittaria zoster-ifolia bory.
young ice
Zogirma