苯硝基甲烷

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(162) / 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(137) / 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(116) / 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(108) / 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(156) / 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(160) / 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(297) / 评论(0) 分类 英语新闻
学英语单词
aberratio mensium
abnormal circumstance
access path selection
accidental murmur
Anisograptus
antetype
aosmic
apparent molal heat capacity
attritionary
bacterial protein
bag of bones
bribea ble
bulbar conjunctiva
buret meniscus reader
buried depth of spillpoint
Cauchy-Hadamard formula
cinchonised
coax wall slots
confeder
conical semigroup
Croton cascarilloides
deep sea trench
degree of polymerization (dp)
dime dropper
droplock stock
drum saw
dry plate processes
duodecemvirate
duplex-scanning
equal-area latitude
ethercap
experimental methods
extemporary
fast combat support ship
feux de joie
gas tungsten arc welding-pulsed arc
gebs
glossatorial
hammermeister
handle setting knob
hold somebody off
hybrid vigor
inclusion method
jockeys
Kānthālia
lag compensation
Lagny
laryngoscopists
linear first-order differential equation
lynx
Meandarra
MEGS (megacycles)
milkstains
mizidi
modulus in tension
multi-function array radar (mfar)
multiple reduction gear box
myricetins
network register
nippin'
nonprimary
nonylic
of the Road
one-nil
overtopping discharge
passivated insulating oil
PC (power center)
piru
podophylloquercetin
Porel's fornix longus
radium d
RANDID
re-offer
reading stability
Romerike
sampling counter
single-terminal
Slavophobe
spacelines
sphenofrontal suture
spray injector
steel-hearted
store receipt book
stratherns
Styrax chrysocarpus
take a displeasure against
tax proposal
tetroses
theeline
thionyl benzene
three-ball match
thwaitesii
TIAg
tiberius claudius nero caesar augustuss
tie up someone's hands
trawl lines
true to one's colours
Verkholipovo
wassar
wire woven
woolcock
zigzag welding