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(145) / 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(173) / 评论(0) 分类 自然百科2011年

图片1 图片2 图片3

发表于:2019-02-09 / 阅读(265) / 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(167) / 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(348) / 评论(0) 分类 2019年VOA慢速英语(二)月
学英语单词
accounting literature
backactions
bacteriotoxic
be at a deadlock
Bevaix
bimetallic strip gauge
boresomeness
Carpoidea
case class
centesimal scale
clypeomorus bifasciatus
cold wall
colourimeter instrument
competitive differentiation
concrete shaft lining
controlled atmosphere
Corydalis gymnopoda
CPPH
cross over to the other side
demelverine
density modification
destalinization
diazin green
digiti minimus pedis
disattend
double -headed arrow
duplex driving
dynamic adaptive routing
easy-off flask
effect of salinity
electronics in fluid
Elota
established fiscal policy
extensor securndi internodii pollicis
full time four wheel drive
full water cooling generator
gang driller
genus Anhima
gold-plateds
ground voltage
Göritz
hand carrying type rail tong
human character
hypercollinearity
igneo-aqueous rock
incidence angle
insect transmission
interceptive occlusal contact
internal partition function
interveined
IR stimulated luminescence
kaysones
KBE (keyboard encoder)
kilowattage
Kondo resonance
lime-mud
locked-coil conductor
lost data
lubricant cell
Lustadt
made their exit
main oil distributing passage
matters in deed
mud dredge bulb
non-excited synchronous motor
organofluorines
panamica
Papiamento
pentagonal tristetrahedron
pipe-insert with rainer
power gain tester
propetamphos
psilocybe coprophila
quartet, quartette
rocker arm cover
sawa's criterion
semitransparent mirror
ship survey
sonoyta (sonoita)
Staphylococcus tetragenus
static test site
steady state optimization
stochastic net
stock issued for property
stone bass
straight-flights
time management
tool-box slide
transversal system
Travers, L.
treated carbonates
tuberculolytie
tungsten-powellite
two-stream instability
undelivered cargo list
vector quantization
vertical overhead contact system
virgin wools
weak-kneedness
wjff
yod-dropping