[地物] 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(128) / 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(145) / 评论(0) 分类 自然百科2011年

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发表于:2019-02-09 / 阅读(239) / 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(159) / 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(330) / 评论(0) 分类 2019年VOA慢速英语(二)月
学英语单词
acquisition mode
agreste
al-nidaas
Allium henryi
bleeder heater
bombed-outs
bradytrophia
byte address
cash balance standard
cheese burger
cheneys
chicagoes
civilian labour force
Cleare, Cape
cold thrust
complete plants for cultivation
consumptive's weed
contactor group
copper electroplating on ceramics
cosmolanguage
crash-dived
cupric carbonate basic
curable depreciation
Demoncrat
devascularization
diacylglyceral
ear scoop
earth survey satellite
electoral processes
exterior finishing material
Fadormir
faecal occult tests
feed timer
fernenol
ferri-gehlenite
file photograph
first order recursive program
flagellate disseminule
flashed opal glass
forgeability
free molecule
gallizes
genus ochromas
gharbiya (al gharbiyah)
gum mastic
homologous serum hepatitis virus
hot surface ignition temperature
hydraulic sway brace
imbalance
index ready circuit
insertion activity
iodination
it ain't the meat, it's the motion
JIAC
laser guidance
lend one's countenance to
Lighthouse Reef
liquiritin
man-rope knot
microcomputer function organization
mionectic
Mitrephora wangii
night direction-finder
Njora
nonadecadienoic acid
North Vietnamese
not a particle of truth
output-restricted
parasol ant
Pechuran
pentagoron
presbyopia
prime responsibility
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psittacotic
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third-speed
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undee
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wastewater collection