特性声阻抗

[00:03.15]第二单元 课文A [00:06.30]tax [00:08.07]税(款) [00:09.85]generally [00:11.31]一般地,通常,大体上 [00:12.77]federal [00:14.15]联邦的 [00:15.52]type [00:16.95]类型,种类 [00:18.39]salaried [00:19.87]拿薪水的,领工资的 [00:21.34]salary [00:22.71]

发表于:2018-12-04 / 阅读(93) / 评论(0) 分类 大学英语自学教程上

本讲为2005年下半年新的教学内容,请对照教材听录音! Wind is the characteristic of spring. Women _being_ (be) the weaker and dependent sex , it is only natural that they should cr

发表于:2018-12-15 / 阅读(98) / 评论(0) 分类 自考英语(一)78讲

插座、插头和其它连接物(电器连接) Sockets, plugs and other contacts [electric connections] 插头、插座及其他接触器(电接头) Plugs, sockets and other contacts [electric connections] 表面覆有带电导体的玻璃 Glass

发表于:2018-12-18 / 阅读(77) / 评论(0) 分类 英文语法词汇

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(83) / 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(82) / 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(84) / 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(114) / 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(132) / 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(112) / 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(131) / 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(88) / 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(92) / 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(82) / 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(66) / 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(92) / 评论(0) 分类 2015年VOA慢速英语(九)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(102) / 评论(0) 分类 VOA标准英语2009年(十一月)

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(91) / 评论(0) 分类 2016CRI中国国际广播电台

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:2019-01-31 / 阅读(92) / 评论(0) 分类 能源行业英语

1) 事实状态的动词 have, belong, possess, cost, owe, exist, include, contain, matter, weigh, measure, continue I have two brothers. This house belongs to my sister. 2) 心理状态的动词 Know, realize, think see, believe, suppose, imagine, a

发表于:2019-02-02 / 阅读(115) / 评论(0) 分类 英文语法词汇

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(128) / 评论(0) 分类 实用英语
学英语单词
adenine nucreotide
aero-generator
air reaction
anion semipermeable membrane
ASCII files
atmosphericsound
auditory capsule fontanelle
autoimmune progesterone dermatitis of pregnancy
backfeed
Bad Sulza
black stalk
black-headed
blood-stain
boarding machine
boeke
boucht
CAL
case committee
chekhovs
chuck ring
cineraceous
conversion matrix
corneal forceps
coronoid
corroded
cross thread
cyche
daraga (locsin)
denationalization of money
double strut
easting
errate
euryecious
extinctors
forced-commutated inverters
free flowing bulk material container
gnophomyia (protogonomyia) scutellumalbum
hardwood finish
heater wire
HEPL
Hydrangea caudatifolia
hydroxyamfetamine
intermediate axle
japanned leather
job-lot method
kayamb
kedged
labial stops
licenced
liquid oxygen loading test-control desk
lobsterize
look you
loss on retirement of fixed assets
loudspeakers
lyrica
marine aggregate
maximum thermometer
megohm-meter
merger with
mnchen
monumental peak
multiphase reaction
Nematan
nerveroot
news propaganda
newsstand
nonstupid
organa-metallic compound
petroleum hydrocarbon resin
prebending
protoplanets
Qezel Rūd
queel
rig-a-jig
rights on
scribals
self-cooled
semen abri
semi-permanent data
shading masks
single phase short circuit
small spaces through which water and air may pass
softening degree
solidly ground
sound intensifier
special staining
splashing around
standing - on - nines carry
streaky gneiss
take to his heart
Tarims
through air waybill
topping of crude oil
troubleshooting data
Tyul'kubasskiy Rayon
uneven finishing
unharassed
variable-area turbine
was able to
Wayamli
work center id
yelton