古地磁极

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(136) / 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(158) / 评论(0) 分类 自然百科2011年

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发表于:2019-02-09 / 阅读(250) / 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(163) / 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(340) / 评论(0) 分类 2019年VOA慢速英语(二)月
学英语单词
agro-town
air plane sprayer
alarm printer
anthropized
anti-stall gear
appropriament
astronaut
attack au fer
baggage foreman
beta hydroxybutyric dehydrogenase
bhaktivedanta
boletus zelleris
Bonnevie-Ullrich status
bummalo
cash merger
Castiello de Jaca
central-west
chimpanzeelike
chrysophoron
circadian oscillation
circuses
contrapropeller
coomaraswamy
cotise
danakil depression
Deltapine cotton
digital printing
discoverment
dog-child
down-run
drive an agrument home
Edlitz
effect on preference reversals
engine kilometer
error-correcting parsing
exfoliatio areata linguae
family zygophyllaceaes
fluentness
force frames per second
fork-lift truck
green space
heat effect
Honnay
hundt
hydraulic structure monitoring
Identity Ecosystem
informances
installment receivable
joint material
kelseys
Kochëvo
lateral natural seeding
loftman
lyonpoes
man-made element
mastergroups
micrometer buret
military censorships
minigreenhouses
missilemen
multi-issue
n-octyl nitrate
nail-bomb
narong
neoburlesque
not care a red cent
nutured
once-a-month
packer arm
Paesia
processed urushi
ramillary
real number field
recognized quotation
restrictory
roncaglia
s.p. log
scuttle-butt
seeding on unfallowing field
short distance transportation
shunt transistor
single layer bit
somnifying
space biology
spina bifida occulta
state-assisted
stotinov
stratum subserosum
strong-arm provision
tape punch interface
Tidore Island
tracking of ions
tuberculosis of bone and joint
Turbo Duo-Twist machine
two movement from
undersheriffs
unplanned outage time
vid.
welfare-to-work
were-wolves
white Paki
withdraw command