声衰减测量

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发表于:2018-12-05 / 阅读(259) / 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(97) / 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(99) / 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(84) / 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(128) / 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(144) / 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(123) / 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(151) / 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(91) / 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(82) / 评论(0) 分类 电信英语

AT Command - This is the character

发表于:2019-01-03 / 阅读(94) / 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(97) / 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(105) / 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(108) / 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(84) / 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(175) / 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(108) / 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(110) / 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(114) / 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(135) / 评论(0) 分类 实用英语
学英语单词
act of usury
ames institute of atomic research
amperemeter,amperometer
Apiezon oil
atomic beam laser
aulacorthum nipponicum
basic rest-activity cycle (brac)
bone flour
butthey
carryke
caterpillar machinery
coil buggy
comoving reference frame
compulsory work
conduction type furnace
czech-slovaks
deadbeat compass
debugging request execution
depression of spirits
ecylert
electric snow melter
erosive adenomatosis of the nipple
Ethmoidomaxillary
fixed angle rotor
furlet
gain colour
gladish
helmrich
homicidal wound
honduran capitals
hypogeusia
IC-BPMS
internet games
isobaric spin selection rule
ivory tint
jack-up test of suspension
jackstay
Kalola
keratinizatioin
letter location
li'l' old
longiaristatus
loose-flowings
machintosh
Manacas, Cayo
master contactor
meems
melafix process
mianin
miscellaneous charges order
myelogonium
noest
North-South negotiations
open-circuit transition
piprinhydrinate
polar orthographic map projection
political-funding
postcardlike
praying machine
prolactin release inhibitory factor(PRIF)
pseudo philosophical
pulling in machine
random-shaped stone
rerollable
Rhododendron bonvalotii
rugged catalyst
s-factor(special factor)
scattered read
sea-born magnetometer
seajack
servo dyne
slow-speed machine
Smith, William
spell-able
spellwork
sperm tubule
static loading test
subglacial relief
subsurface waterlogging
suerging force
Suez Canal Zone
sulfation reaction
taemuui-do (richy i.)
tempest-tosseds
the business of the meeting
thermal desorption spectrum
thermodiffusiophoresis
Thompson process
throat gap
tide zone corrosion
transistor circuit engineering
tricho-rhino-phalangeal syndrome
unbrotherly
unit of cargo
unthanked
UV-light activator for resin polymerization
vinyl sulfide
violative
volumetric standard
watch dial
westgates
xenophora solarioides