声衰减测量

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发表于:2018-12-05 / 阅读(288) / 评论(0) 分类 商业服务英语

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(125) / 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(126) / 评论(0) 分类 Scientific American(五)月

And you know, along the way in this journey of discovery, I learned a lot. I learned a lot about science. But I also learned a lot about leadership. Now you think director has got to be a leader, you know, leader of, captain of the ship, and all that

发表于:2018-12-30 / 阅读(111) / 评论(0) 分类 名人励志英语演讲

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(154) / 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(175) / 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(152) / 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(183) / 评论(0) 分类 60秒科学

Transmission Facilities Transmission facilities provide the communication paths that carry user and network control information between nodes in a network. In general, transmission facilities consist

发表于:2019-01-03 / 阅读(118) / 评论(0) 分类 电信英语

I-MAC isonchronous media access controller IDN integrated digital network IEC International Electrotechnical Commission Impairments Impairments is the (e.g., transmission channel and signal impairment

发表于:2019-01-03 / 阅读(108) / 评论(0) 分类 电信英语

AT Command - This is the character

发表于:2019-01-03 / 阅读(127) / 评论(0) 分类 电信英语

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(124) / 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(132) / 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(163) / 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(111) / 评论(0) 分类 Scientific American(八)月

True, he had not the qualities of social humor or wit, but he was an example of indefatigable industry. 实际上,他天生没有幽默感,也不会说俏皮话,可他是这一行业不辞辛苦劳作的典范。 He came to his studies every mo

发表于:2019-01-10 / 阅读(205) / 评论(0) 分类 美国语文第六册

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(134) / 评论(0) 分类 2015年VOA慢速英语(九)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(136) / 评论(0) 分类 2016CRI中国国际广播电台

Scotch whiskey is said, by some, to have many magical qualities. Now, scientists in Scotland have discovered one more: it can be a weapon against polluted waste sites. A by-product of the spirit is 99.96 percent effective in cleaning contaminated gr

发表于:2019-02-05 / 阅读(141) / 评论(0) 分类 VOA标准英语2008年(十二月)

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(162) / 评论(0) 分类 实用英语
学英语单词
abysmal
affine cudweed
aisleways
allestree
appraisal report
as mild as a as a lamb
asgmt
babesia major
baums
boosting site
bore it up
Buyeo-gun
buying for business use
cancerphobia
carcelia (carcelia) frontalis
carlyon
carnivoracity
children's language
clupea harenguss harenguss
crystal headphones
Data Communication Network Architecture
Dependent Claims
deskpros
direct control
Dodman Point
drumlinoid
elliptic(al) wheel
false gill
feminist theory
fruit tree horticulture
genus menthas
glancing over
haplothrips aculeatus
haume
hiziki
horizontal return flue boiler
idled away
ilastical
Impeyan pheasant
inaccesible
induced transition cross section
inferior region
intra-aortics
judicial administrators
khana
korean-style
labour income
law of freezing-point depression
lawn chair
leave sb standing
lipolytic hydrolysis
Lofty, Mt.
match play
maximum scale
MCI-HR
Melampyrum
Myer's method
myocardium
nickel-molybdenum thermocouple
normal circular distribution
orbitoid
organic solution
ortyiopistyius
Oswald Spengler
padrino
petion
phrenocardia
plough steel wire
plural-box shuttle-changing loom
power decelerator
PROGANOCHELYDIA
propriate
pulse time
ravestre
relocation package
remind somebody of
salisbury
salping-
sandela
scopomamine
smoke density meter
sprangly
steel-shelled concrete pile
strain wire ator
Taisetsu-zan
terrain vehicle
theatre-list
Tolstoians
tooling layout
transient heat flow
tunket
undecked beam
under-representations
undercounting
up-side-down
Uttenweiler
velocity-controlled system
water gland
white-pink
Windows File Protection
Zetamicin