场磁极

By Parke Brewer The women's pole vault provided one of the stirring dramas of the 2004 Olympic track and field competition. Until the mid 1990s, women's pole vault was not taken very seriously, mainly

发表于:2018-12-12 / 阅读(82) / 评论(0) 分类 VOA2004(下)--雅典奥运

Larry Newitt from the Geological Survey of Canada charts the movement of the magnetic North Pole as it wanders the icy reaches of northern Canada. To determine where the magnetic pole / is, we can't rely on one single observation. What I try to do is

发表于:2019-01-22 / 阅读(80) / 评论(0) 分类 自然百科2011年

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发表于:2019-02-09 / 阅读(169) / 评论(0) 分类 加州语文教材California Treasures G5

By calculating how old the rocks are where we find these ancient compasses, we can figure out how long ago the magnetized parts were locked in. That tells us which direction was magnetic north tens of thousands of years ago. Surprisingly, its not alw

发表于:2019-02-23 / 阅读(101) / 评论(0) 分类 英语时差8,16

Magnetic North Pole Moving Faster Than Scientists Expected Earths north magnetic pole is moving, researchers say. It has moved so much, so quickly that a group of scientists hurried to change a model that helps guide shipping, airplanes and submarine

发表于:2019-03-12 / 阅读(262) / 评论(0) 分类 2019年VOA慢速英语(二)月
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'ukulele (hawaii)
addition and betterment reserve
al-zawahri
all-savers certificate
ampulla ductus lacrimalis
angular gap
Aotearoan
apartheiding
Argyrotaenia
B-service area
barophilic baceria
batz
bed-sitting-rooms
bipupillate
bromethylene
buoy-to-buoy time
business warning indicator
butyl glycidyl ether
capital grant cycle
carcinids
cataclesis
chordae urachi
ciche
cocoonase
coincidence (muller 1916)
cryolithozone
cursillo
cybernation economics
daily surplus production
daphniphyllum oblongum chien
dead melt
degeneration four-wave mixing
die stamping press
diphenol
documentably
energy reflection build-up factor
engraver's proof
Erlenmeyer
experiment with clay model
extent map
familial trait
fibrous peat
fissurae horizontalis cerebelli
fixed negatively charged exchange site
flurouracil
genus pediculuss
high-velocities
horel
hydro-electric engineering
index thermometer
insertion model
insipidity
integral-dose
irsogladine
jejunoduodenostomy
Jodzhl
lathe frame
main practice
manganese-steel frog
mateers
mauron
melon seed chocolate
mineral caoutchouc
mushroom-picker's lung
nesting indirect command file
norpinanyl
nuclear periodicity
optical acoustic diffraction
PDEA
phenacaine
PHOLIDICHTHYIDAE
phonetic input method
procurement regulation
relexifying
relief/safety valve
remanufacturer
retinulate
sacral artery
sacroparasitus
salties
seeder cloud
sock it to
solvent washer
spherical-earth attenuation
Ste-Croix-Volvestre
subrepitant
super video compact disc
Swinging Sixties
Thallo
Thilaven
ThinWire
to dog
trade promotion division
tryptophyl
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user submitted batch job
vaporizability
variable gain amplifier
Vila Nova da Armada
webbie
well-counterfeited
zoster nuchae