1-苯丁烷;丁苯

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(118) / 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(95) / 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(59) / 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(57) / 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(105) / 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(103) / 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(223) / 评论(0) 分类 英语新闻
学英语单词
-aceae
acdelco
allomones
Ammosphaeroidina
anti-foaming agents
beast-fable
calling card
cannot bear
car design
cargo oil control system
cassette unit
ceramic rod flame spraying
Chasico
chill mould
chronic fluorosis
colorcaster
Community reserve
control terminal
corpora mammillare
corrosion failure
critical depth water meter
crossing guards
cusped arch
depreciation-arbitrary
dossie
ecological energetics
emels
false keelson
fan-out circuit
fine grit wheel
fits and starts
flash message
four poster bed
function processor
general control system
Hagada
handling of materials
hexafluorosilicates
Hibiscus heterophyllus
high definition TV set
HPSB
ibn-Roshd
inertial navigator
infantum tabes
Ingjaldshóll
joul
karamanliss
keyword in the command language
laser search apparatus
lilyan
malac-
mangione
Mantchoo
move to next point to use
multiacavity
multiple pointer
Namsi La
natrium sulfuricum siccum
nidulant
nonprinters
pair-royal
parameter type
patch and cut repair
periosteorrhaphy
piezo receiver
pilgrimer
pipins
Play Cu, Cao Nguyen
plum-tree
pulse height distribution
quadriceps surae
radio traffic
radiostat
retiring trustee
ring stack transducer
rugless
sea mile
selective focus
side spectrum
Siler divaricatum Benth.
silver leaf electrometer
size of memory
specified combatant command
spokesladies
subluxation of radial head
switching mode power supply transformer
table licence
tail gland
terms of trade indexes
Themeda anathera
thermoluminescence dosimeter
tobacco hornworms
topologically closed set
trace of element
true proposition
turn key project
unvaile
unwhet
Vogt-Koyanagi
volatilecontent
wellus