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(106) / 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(109) / 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(202) / 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(126) / 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(301) / 评论(0) 分类 2019年VOA慢速英语(二)月
学英语单词
a mountain of
adaptive digital control
albumensac
allotopic distribution
analytical equipment
anococcygeal body
arctic regions
arteria meningeas
Asaka
bactrocera (zeugodacus) mundus
balance sheet tests
book concern
carry no weight
ceratuba
charge on real estate
Chhabra
cross-platform transfer
cumulus pileus
cyberzine
distributed system atchitecture network
Elliot tester
endaemonisms
ENX
epithelioneural bodi2s
Fauser reaction
finkenstadt
Flacyl
flexible leg
full-flow end-of-line smokemeter
gossypetins
heat accumulating fibre
highnesse
hurricane dryer
hydrocarbon emission
hydrogeomorphic
impropering
induced equation
integrated energy density
intermediate frequency motor sheep shearer
Jegunovce
khakiss
king edward vii falls
Kirakira
klaxon-horn
klussmann
laboratory-tested
laricio
liberaliser
link insulator
linognathids
low frequency compensation
low-tension arc
Marigné
meagerest
mechanical sensor
mefluidide
monitoring and control system
motorola 14500b
multiaxial state
national historical park
Neurath
nitroaromatic
on demand bond
Oton
outshame
overhead economy
panoramic comparison
pay one's dues
photosensitivities
positive peoperty
potentilla freyniana borum.
press gallery
prick-tease
product structure file maintenance
rashers
retransmitting
roll-up hatch cover
self-force of electron
septal cell
serge koussevitzkies
sicamour
solution of equations
SSL certificate
star box
struvites
tabacum
the man in the street
tinka
tudy
UCB-1402
unit loop eddy current
unlimited legal tender
unworthinesses
us adapter
Vaimauga Dist.
watchfires
weather adjustment of gyro compass
wet flashover voltage
winding-up proceeding
wine fly
yarsleys
zimmy