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This is Scientific Americans 60-Second Science. Im Karen Hopkin. This will just take a minute. Thars gold in them thar hillsand we may have meteorites to thank. Because it appears that a rain of meteors nearly 4 billion years ago peppered the Earths

发表于:2019-01-08 / 阅读(67) / 评论(0) 分类 Scientific American(九)月

This mining school, complete with sled dogs, was set up in Seattle as a training site for potential Klondike prospectors. Lots of Americans have heard of the Klondike because of a popular ice-cream bar named after the place. It's in Canada, so we cou

发表于:2019-01-13 / 阅读(46) / 评论(0) 分类 VOA标准英语2010年(八)月

Or at least plenty of money wagered in Deadwood's gambling halls Ted Landphair | Washington, DC 03 June 2010 In the 1980s, town commissioners decided to fix up Deadwood and make it a genuine historic attraction. About one million people visit each ye

发表于:2019-02-03 / 阅读(76) / 评论(0) 分类 VOA标准英语2010年(六)月
学英语单词
acetals
aeltus
aero gas turbine engine
Albania
ameiotic
antipathetic)
arcuate ligament
aseptic necrosis of head of metatarsus
ass kisser
astern casing
attapulgites
blakemores
Browney, River
capitalist class
capture-recapture
Chalchiuhtlicue
Chechenia
Chicago
chondrophyte
clamp distance
coelioxys fenestrata
collector screen
comodule
crank guide
Csolyospalos
daylight shift
debruyn
engineering compromise
everidge
fev
filp-flop
finite waiting line model
First Crusade
flabellate
fluophosphate glass
framework agreements
fulfils
gas liquor
gas-enclosed pressure gauge
general operating language
genus loxomas
grid beam
handyworks
IFAP
impure function
in-band signaling
interservice
intransigencies
irregular spiking
kidstar
koinonians
lamellar mixture
lapdancer
launch escape
lotus base
magneto-acoustic coupling
Malcam
Manifold, C.
member,s voluntary winding up
metal dish
MHz
more-competitive
multicarrier transmitter
nomenclations
outlet bucket
over-mild
Oxytropis alpina
pentane diamine
point receiver
Prunus virginiana
retrocedant
rocks and rolls
rolling-disk planimeter
sacropelvic surface
Samoylovka
scaling unit
Selinous
semelids
set of feeder cables
sidewall length
slow breaking emulsified bitumen
Somio
sonatas
splenetically
spruce fir
St-Léger
substituted power
subsystem hazard analysis
sustained deviation
swobble
taking a flyer
thorough-light
Truskmore
twice a year
underfund
velocity modulation bunching
warp-faced fabric
wish someone at the devil
wood decay
wooden-block pavement
wordprocessors
zig-zag scanning order