磁北极

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发表于:2019-02-09 / 阅读(231) / 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(148) / 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(323) / 评论(0) 分类 2019年VOA慢速英语(二)月
学英语单词
adjustable rail gauge
aeronautical mobile-satellite service
air ejector fan
anterior shutter
APLACTAN
association for computing machinery(acm)
beam-lead devices
benignness
bishopric
blanking pedestal
bledel
blood trouble
bound oil
bridge agent
bulk-buys
carboxymethylcellulose(sodium)
case hook
central net structure
contraceptive factor
dacryohemorrhages
de-politicizing
detector guard
Development Bank of Singapore Ltd.
disk doffer
electrical carbon
emitter-base voltage
enaliornithids
Feast of tabernacle
flosssilk
freedom-of-information
freetail
galperson
game-winners
gcg
geometric surface area
Golfo Aranci
Google Store
gully
heating element
Hooghly
hotcakes
hygrostomia
ibm operating systems
information control systems
ink over
inlet of thorax
isojusticin
JFMCC
knobelsdorffs
Kocharite
kolier
lancet fish
linguistic relations
madely
mechanics of rock blasting
military base map
missed-approach procedure
motor vehicle equipment
myocardial abscess
National Fire Protection Association
norses
oikoumene
Ophiopogon amblyphyllus
osmometries
outside circle
palamocladium nilgheriense
pancreatic tumor
paralogistic
perturbances
pituitary dwarfism
pneumatic servo
pole-shoe face
polytomous branching
principle of replication
progressive contact
quote preposing
ranty-tanty
re-espouse
roghe
salted sea-urchin gonad
sand-blasting
screw plug
sink point
sliding door track
specific function
sterile chamber
sunstein
switch tongue
tackle twill
theolatry
thiopropionamide
third cosmic velocity
to engage
total monotonicity
transfer balancing line
two-blade beater
upper frame member
valley tolerance
voltage saturation current
wheal
wrist pin nut washer
Zaroko