9-苯蒽

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(194) / 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(209) / 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(342) / 评论(0) 分类 英语新闻
学英语单词
abated arms
acraturesis
agricultural-technology
air-lift system
airolo
andre ampere
antibird
arrident
articulated unit
awning cloth
battery central
bendopas
blue paste
bone sclerosis
brayd
breeding nursery together
bring sb back to health
by-pass control
cantilevered end
casamino acids
cephalexin-aztreonam-arabinose
charge of passenger transport
chemotactic factor
colour plate
Cooperdale
coveters
damp process
DD (data definition)
dendrophysis
dibbled
dicky
discontinuous grain growth
dish antennas
double switching
duplicate definition
elbings
electric cream maker
erythrocytic colony-forming unit
extension hunting
fakirisms
farfetchedness
ferric hypophosphite
fixed bitumen
flehming
fried fillet slices with onion
general instruction
genus cirsiums
grackles
gyrometric
Harz Mountains
Haute-Sangha, Préfect.de la
horst fault
ice-yachtsman
internal limit gauge
iron-constantan
Leimebamba
let it flow
local-local link
moment of inertia of cross-section
negative-phase sequence
nikisch
nobody knows
non-stocked
nonagons
noxipitiline
officership
onion bagel
otieno
out wire
Overseas Private Investment cooperation
pearl-fish
photoelectric storage
plumbi carbonas
polectron
polypiles
proton radioactivity
pulse-amplitude-modulated sample
quantity breakdown
raft of timber
rectifying installation
Saitama-ken
secondary electron conduction camera tube
silicon fiber
single-frame mechanism
speed tele-recorder
spoil removing
straddle truck
Stuttgart disease
symbolic constant name
ten - gallon hat
Terivalidan
thermal John
Townsend criterion
transducer evaluation facility
triple-doubles
TWB
unministered
Vinnie
white bole
wimpier
wlating
wood blocks embedded in concrete