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(166) / 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(205) / 评论(0) 分类 自然百科2011年

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发表于:2019-02-09 / 阅读(306) / 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(186) / 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(368) / 评论(0) 分类 2019年VOA慢速英语(二)月
学英语单词
3-Anisldehyde
acetylene pressure regulator
alkanium
ancroft
annual value
batching processing
be out with sb
best invariant test for location parameter
biologists
boshers
bottle-glasses
breathing-pipe
Cannabamine
cellulose-coated plate
coccolithosomes
content-rich
contraction of catalyst
cranial articular process (or prezygapophysis)
degeneration coefficient
Diguanyl
direct current furnace
dobby
double entry book-keeping
drawing-in draft
Dreitzsch
ethnic heritage
fancy ball
finishing to gauge
flerobuterol
forbled
forward option
genus Chilomeniscus
global consciousness
group sub-control station
Hausmann)
homophil
hydroquinone diethyl ether
hyperactivation
initial mass function (imf)
jaumes
jaw oil
kaiser-frazer
keto-acetic acid
label printer
Lewisohn's method
low-light tv
Lulworth skipper
madcap
make an assay of
metal film resistance thermometer
microphenocryst
mileti
minium
multisync monitor
nasty-gram
negative cotton
newage
nonanalysts
nonswitched transmission
normally open interlock
oil-filled pipe-type cable
parallel layup
pedate leaves
perturbing effect
Pocket Internet Explorer
pogonia macrophyllum bryol.jav.
post-chariot
potassium biiodate
powder coating technique
Pradales
railway worker
retention forecasting
reular
RRE
self-propelled bucker dredger
semiotic approach
sesquipedalians
setificio
shaveling
slow twitch fiber
spherical weathering
stretch bending
Subcoma
succinaceus
superior government
supermarket chain
supernumerary bud
system log file
T. Ev.
take a stand on
tarikh
Tazin L.
theatrist
ticktocked
toadlings
tochas
tremulant
vasopil
verballed
virtual power
whey off
wingy