[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
-tious
abscess of heart
activity-specific
admiralty anchor
allohateroploid
analog stop control
anamorphism (anamorphosis)
angina laryngea
audit preparation
bathochromy
boligee
bookingform
break bread
chartered bus
chromium doped ruby crystal
cod roe paste
computer switching
consecutive prices
coyltons
custron
cytoplasmic island
directlife
dominance relationship
Donald McGill
drainage discharge rate
economic paradigm
egg salads
eva-marie
finned spacer
first reduction pinion
fluerics (fluidics)
foxbat
gelid
greenwich solar time
gummosity
heahs
heat formable micanite
immunodeviation
lacrimal reflex
last-mentioneds
lathraea purpurea
least squares estimation
maternal seedling
Mathis Field
mauree
mnementh
monadelphous
monocarpic perennial
mortgage servicing
multiple unit valve
munchmuseet
mustang
non-bloating
nonillion
numeral row
nyafe
Nübbel
octomeral
one-dimensional lattice
originating user agent
pancreokinin
parney
pre-employment physical examination
privies
prolongability
pseudo-ceratophorus
pudendicity
quality control program
queer bashing
quicksandy
quinine carbolate
reassembly lockup
register key
rhogocytes
Rosa derongensis
Sapouy
sddr
sessional appointment
ships loading computer
side mirrors
sigillated
Silene puranensis
sinvergenza
solvent-free reaction
soup-spoon
starch dusting
status-of-equipment board
steam grate shaker
subsarcolemmal cisterna
subterranean heat
telegraphic keying
tetrahydropyridines
thermal difference
toroid worm gear pair
triethylphenyltin
tuberous bromide-rash
undertrumps
unmoulded
uroporphyrinogens
waterproofer
yacht chair
yellow banded water snake