古磁极

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(174) / 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(216) / 评论(0) 分类 自然百科2011年

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发表于:2019-02-09 / 阅读(313) / 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(191) / 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(378) / 评论(0) 分类 2019年VOA慢速英语(二)月
学英语单词
ALGOL-68 program
all-ceramic
allow part shipment
anthropinistic
aracatak
autonomy of gene
autotrace
bai khan
basque shirt
bend level
Brachychiton acerifolius
bridalwears
brunishing-in
call for bids
Canadian Arctic Shipping Pollution Prevention
capitals of nicaragua
case base
cash conversion
chack'ed
Chekiang First Bank Limited
chemoreceptor
cold zone species
continuous revision
cost push inflation
downsize
Drive you spare
echoendoscope
electric fuze
emerys
Falco subbuteo
flat contact heater
forged share transfer
frameset
fuel oil cleaning equipment
fuzzy quantifier
gas flow indicator
General Purpose Systems Simulation
glacier survey
hanging ball
heterochlamydeous flower
hogtie
i-steien
iconical
inconcert
integral differential
IPWMI
knowledge dissemination
lapsed gift
lens fog lamp
Levyy Il'yak
lillo
long rail
markee
metainformation
multicombustible
named source file
nanopure
nitrocarburized
nonphosphopeptide
olivine glimmerite
omission solid solution
original patent
oxomuramine
palaeopsychology
pesticide residue analysis
pH (value) control
phytoentomology
plain shaking screen
polyglacialism
porculation
pressure-operated valve
problem-solutions
processibility test
pseudo-arithmetic operation
ramus internus (n. accessorii)
rather rough sea
referential transparent
reform of the international monetary system
repurcussion
reverse reasoning
rocker arm link
rockeried
S.F. (self feeding)
sapropelic substance
Sarandi
security administration
shipping route
sleep over a question
smoke cured
subclinical diabetes mellitus
supramolecular structure
tetracosanic acid
the lunatic fringe
topicality
Tovégan
transverse velocity
unobserved component model
upper difference threshold
vase with small mouth and pointed base
vat-dye printing
zerosuppression
zhenwu decoction