玻璃状石英,琉态硅土

Plant Self-defense Plants may appear to be helpless in the face of hungry,toothy animals but many plants have evolved interesting systems of self-defense. Coarse meadow grasses are a good example. If you run your finger along a blade of coarse grass,

发表于:2018-12-31 / 阅读(66) / 评论(0) 分类 英语听力文摘 English Digest

AS IT IS 2015-07-14 Silica Sand Mining Worries Communities 美国硅砂矿引发社区担忧 The United States is increasing production of oil and natural gas through a process known as fracking. This process is sometimes called hydraulic fracking be

发表于:2019-01-12 / 阅读(91) / 评论(0) 分类 2015年VOA慢速英语(七)月

AILSA CHANG, HOST: Despite mounting evidence and a stream of dire warnings, federal regulators and mining companies failed to protect coal miners from toxic dust. MARY LOUISE KELLY, HOST: NPR and the PBS series Frontline spent more than a year lookin

发表于:2019-01-19 / 阅读(91) / 评论(0) 分类 2018年NPR美国国家公共电台12月
学英语单词
adenohypophyseal
aerosolization
al qatrun
alameda r.
all purpose bank
Anabar Dist.
anaks
archnemesis
batching pig
bethanked
camphidine mcethosulfate
carangoides malabaricus
channel wall
Chinese astrology
commercialized
companion to the cycloid
complex haptene
corrected range
cut pile fabric loom
declaratory
dicyclopentadienyl-beryllium
die height range
Dong Phaya Yen Range
dystrophic
endless tape
enzymatic debridement
estamin
estimated shipping date
Fontanesia fortunei
foredetermined
four story fan
Fourier-Bessel series
frame header
free setting of proppant
Frome, River
Fumafer
geared parts
Gymnodinium
heiba
heroogony
high-speed passenger train
hochwald
hussein ala
indian breadroots
inguinal testis
instrumentation port column
Isoglaucon
kindle with
king's omnibus
LDQ
live stub axle
luggagerack
machine hour method
macrofouler
main performance index
make sth over
manual saturation control
Matsumae-hantō
mutual boundary
near linear dependency
nypil
operating oil pump
out-front
paracentral scotomas
pent-
phymatopsis albopes(c.chr.et ching)ching
Procrastination is the thief of time.
quadrature axis component
riffle beetles
rigid overlay
rolypoliness
rosa sempervirens l.
sadoff
Saint Louis Zoo
salt controllable dye
Scott-Wilson reagent
shafting alignment
shear resisting
shunting operation plan
sigillated
snakebite
song-cycles
source-receiver product
special balancing machine
split fish
starch syrup
stellato-
subnodusae
Sumba, Selat
sunshine integrator
tank drainback
techno-utopian
transformation method of data storage
Umtentweni
unmanned module
unsolicited commercial e-mail
us-ec
v. diploica occipitalis
video computer system
video-based
wamb
yellow wood-wasp (sirex gigas)