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This is Scientific Americans 60-Second Science. Im Karen Hopkin. This will just take a minute. Many of the key molecules for life have a specific direction, or handedness: DNA twists to the right, amino acids to the left. Now scientists at the Nation

发表于:2018-12-24 / 阅读(46) / 评论(0) 分类 Scientific American(四)月

banister, ['bnistə] n (楼梯的)栏杆=balustrade=rail 【记】ban挡住,ister东西-挡住的东西-栏杆 【类】staircase:banister=garden:fence楼梯需要栏杆保护=花园需要栅栏保护

发表于:2018-12-30 / 阅读(35) / 评论(0) 分类 不择手段背单词

Three radio stations in the United States mainly broadcast one thing: the official time. The three are radio stations WWV and WWVB, in the state of Colorado, and WWVH, on the island of Kauai in Hawaii. They send out signals that are used by millions

发表于:2019-01-03 / 阅读(54) / 评论(0) 分类 2018年VOA慢速英语(九)月

Youve given some thought to oxygen, carbon, uranium. But youve probably never mused about the element ytterbium, symbol Yb. A new study by scientists at the National Institute of Standards and Technology, or NIST, says that ytterbium could find a rol

发表于:2019-01-08 / 阅读(49) / 评论(0) 分类 Scientific American(八)月

Next year will mark the 110th anniversary of a U.S. government agency that is unknown to most Americans. Yet its work affects their everyday lives in countless ways. Generations knew the agency as the National Bureau of Standards. When it was founded

发表于:2019-01-14 / 阅读(41) / 评论(0) 分类 VOA标准英语2010年(十一)月

Tell me, Mechanist, is it true? Does none of it bother you? Once upon a time Upon a time behind us The mechanist inclined Clockworks of time define us Who you are, who you are; Merely springs that tick The time of things away The cry from the beast i

发表于:2019-02-25 / 阅读(71) / 评论(0) 分类 英文摇滚歌曲
学英语单词
Afropunk
Amulree
bank cutter bit
banobos
barber 's shop
bialosky
bicipital groove of humerus
birth pool
Breda's disease
bridge balancing
calibration for lateral adjustment
catch lever
ceyhan nehri
circulant
city noise
clam-shell excavator
Coimbra, Dist.de
coincident configuration
combinatorial optimization
condensed balance sheet
coprotus ochraceus
cotton gin
Diaradinga
Dicynodon
Down the hatch!
DROMAIIDAE
drosophila (sophophora) quadraria
Dubyaea glaucescens
eco-aware
electrolysis apparatus
electrostatic machines
flapperdom
formal parameter section
fortunately
free wheel overrunning clutch
Gandhiists
guinea-bissau monetary units
helicopter energy/rotor management system
hermia
Houdry process
Hypericum elodeoides
individual term
input/output condition
intracanaliculi
Iseltwald
juncus effusus linne
king harold iis
kroci-
labour relations
lacecap
light current
long time notes payable
lubricant life
lumbar vertebra
multiple activation
navy specification
needle effect
nevomelanocytes
non-time-delay
one-pipe forced system
ots
output cost ratio
Oxytropis subfalcata
paper-backeds
parametric transformer
pericycloid
pillow shams
pitch time
Plenastril
polynomial fit
prime-focus-feed antenna
radial curve
reflector compass
regular abrasive
regularities
research agenda
roger taneys
Roget, Peter Mark
Rāf, Jab.
salt sickness
second brillouin zone
shallow-diffused cell
shipper's load and count
skett
solder paste
sporoplasm
sprittled
stable valley
stirious
strongly basic
structural network analysis program
terranean
the Straits
thiamine hydrochloride
tmr
tool drum
Turlock
turnip bed
Tussizid
unhoping
vena cutanea ventr.
wellshaped