吸声系数,声吸收率

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(58) / 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(54) / 评论(0) 分类 Scientific American(五)月

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(47) / 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(51) / 评论(0) 分类 Scientific American(五)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(45) / 评论(0) 分类 2015年VOA慢速英语(九)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(93) / 评论(0) 分类 实用英语
学英语单词
4-Styrylpyridine
absence of vas deferens
achidi
alkadienes
amicable numbers
Amidinocillin
antenna servo
Aqbalyq
arcas-robin system
ash-free
askival hill
backrower
baudot correction electro-magnet
boff out
Breisky's disease
budget classification
careful consideration
carosso
centered on
chalcoalumite
chauffard's syndrome
clambakes
Clerodendron cyrtophyllum Turcz.
cloud-detection radar
cognoscente
cold brine mixing
colourless hollow ware
complex coordinate
cribbing
crow-pheasant
davit socket
deficitclause
devenney
drug latenciation
elephantiases
equivalent bending moment
fail safe
follicle cell
Fresno el Viejo
Gaddafian
galison
gauss (g)
get someone in one's pocket
goldners
got the hots for
haptonomy
harnessed
have a bad time
health supervision
high-involvement
hold bar
hypergeometric polynomial
impact stress
investment middlemen
irrespective of percentage
isepamicin
laconica
Lagranian
law of reflection
long normal
machine switching telephone system
maxwell-wien bridge
mebi
metalumina
moncloa
mq developer
multibit branch
multiple station interface unit
oungan
Padre Island
pafos
periduodenitis
PIC (pressure indication and control)
pleuroploca trapezium
Posada, Fiumi
post-taliban
proboscis monkeys
Pyshma
quadrosonic recorder
radio-thermoluminescence
referentes
resistance losses
Sangareddi
satellite-to-satellite communication
semi-permeable material
shared waters
shenderovich
snelf
software subsystem
solid-propellant booster rocket
splinter-proof glass
steam propulsion
substandard product
system-managed
thyroid gland
ticklely
to run the risk
top curve
tropic higher high water
valentinianus
zanyas