苯基蒽

Many of the Burgess specimens have now been assigned to living phyla just where Walcott put them in the first place. 许多布尔吉斯标本现在已经归到活着的动物的门里就是沃尔科特最初放置它们的地方。 Hallucigenia and s

发表于:2018-12-18 / 阅读(198) / 评论(0) 分类 万物简史

This is Scientific Americans 60-Second Science. Im Steve Mirsky. Got a minute? To keep your car purring, you have to change the oil. Such maintenance produces eight billion gallons of used motor oil annually. Some waste oil does get re-refined to pro

发表于:2018-12-24 / 阅读(176) / 评论(0) 分类 Scientific American(三)月

Fun Fact: Alligators Can Regrow Teeth 有趣的事实:短嘴鳄可以再长牙齿 Fun fact about alligators: they can regrow any of their eighty teeth up to fifty times. Which is pretty impressive, especially compared to us relatively dentally chal

发表于:2018-12-28 / 阅读(161) / 评论(0) 分类 初学者听力文摘精选

its time again for the A Moment of Science mailbag. A listener writes: Dear A Moment of Science, Ive always been fascinated by volcanoes. So I was wondering: How well can scientists predict when and where a volcano will erupt? Intersting question. Th

发表于:2018-12-31 / 阅读(149) / 评论(0) 分类 英语听力文摘 English Digest

This is Scientific American's 60-Second Science. I am Steve Mirsky.Got a minute? Talk about your vicious cycles. A new study finds that belly fat could be making you hungrier. Which would lead to more belly fat. The research was performed at the Univ

发表于:2019-01-08 / 阅读(196) / 评论(0) 分类 Scientific American(四)月

Algae seem harmless enough. These precursors to plants thrive throughout the world's waters. But these single-celled plants have global consequences. We can thank them for oxygen in the atmosphere, oil in the lithosphere as well as dead zones in the

发表于:2019-01-08 / 阅读(210) / 评论(0) 分类 Scientific American(十一)月

WASHINGTON, Aug. 4 (Xinhua) -- Researchers have found a way to turn mouse embryonic stem cells into sperm and this finding opens up new avenues for infertility research and treatment, according to astudy published Thursday in the online edition of jo

发表于:2019-02-04 / 阅读(344) / 评论(0) 分类 英语新闻
学英语单词
2-iodobutane
a silver doctor
abluding
Adams,James Truslow
agroindustry
altar bells
anadromes
as time goes by
attendance money
ayyubids
Bialorbagy
boiler control instrument
chemical derusting
chemical stabilization
chromosome pairing
circumstellar matter
coconut shies
composter
corpns
Dampier Arch.
dial-up Internet access
dichopodial development
discrete field-stop aperture
duck hook
duplicate field
El Peloto
eligar
enjoli
epeen
equivalent noise bandwidth
evening parse
extra arm
fests
flat picture
futuro
Gammasol
gasjet
geomagnetic tail
geometric rate of increase
giant stock beans
Hamberg Lakes
hemomyelosis
high potential source
Homalium kainantense
home-supply
horsetail milkweed
Humbermouth
IMIB
interal ear
ischaemic stroke
keitloa
knotted bar iron
local conditions hypothesis
made a choice between
median suture
mist blower
motor protection relay
Mount Hagen
mutual designation
n'existe
Nafaanra
national executive
natural foundation
neural computing
Neurectasy
norns (scandinavia)
onence
operational provisions
pedestal grinders
PHOSITA
polydnavirus
poulp
prairie itch
proper value
pulps
pure yeast propagator
Rauvolfia verticillata var. officinalis
Rozhnyativ
ruhr valleys
Sadāseopet
Schizachyrium delavayi
seakings
side window handrail height
sour ... on
spathodea campanulata
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swan neck motion
tfiib
tnfalpha
tresnowski
Tutcheria pubicostata
understandest
ventolin tablet
wa-wa pedal
walk the streets
water fleas
Web site
woven fabric
Yours respectfully
Zea mays L. var. saccharata Bailey