音标:['stʌbswitʃ] ;
n. 【铁路】正轨移动(或钝轨)转辙器

This is Scientific Americans 60-Second Science. Im Karen Hopkin. This will just take a minute. If youve ever wondered where the Earth came from, the answer, it seems, is blowin in the windthe solar wind. Or so say scientists who, after examining sola

发表于:2019-01-08 / 阅读(61) / 评论(0) 分类 Scientific American(七)月

反射星云是靠反射附近恒星的光线而发光的,呈蓝色。反射星云的光度较暗弱,较容易观测到的例子是围绕着金牛座M45七姊妹星团的反射星云,在透明度高及无月的晚上,利用望远镜便可看到

发表于:2019-01-08 / 阅读(175) / 评论(0) 分类 托福英语

The Aeneid by Virgil 《埃涅阿斯纪》维吉尔 Mark first read the Aeneid while he was studying Latin in high school, and he recountedthe story of Aeneass quest and his desire to build a city that, he said, quoting the text in English, knows no

发表于:2019-01-17 / 阅读(40) / 评论(0) 分类 阅读空间

The Aeneid by Virgil 《埃涅阿斯纪》维吉尔 Mark first read the Aeneid while he was studying Latin in high school, and he recounted the story of Aeneass quest and his desire to build a city that, he said, quoting the text in English, knows no

发表于:2019-02-01 / 阅读(29) / 评论(0) 分类 阅读空间

How old is the Earth? 地球的年龄有多大? Well, by counting the number of isotopes in a sample of rock that's undergone radioactive decay, 通过对岩石样品中正经历着放射衰变的同位素计数, geologists have estimated the Ear

发表于:2019-02-13 / 阅读(37) / 评论(0) 分类 TED演讲教育篇

It looks like a hand of God reaching out into the cosmos, but NASA says the display is caused by a young and powerful pulsar. Taken by NASA's Chandra X-ray observatory from it's orbiting 360 miles above the Earth, the recently released photo of Pulsa

发表于:2019-02-16 / 阅读(74) / 评论(0) 分类 实用英语
学英语单词
'twixt
-astic
abel meholah (hebrew)
acid tongs
alphosis
already
arsas
available content
battle damages
Benedetto Caetani
brain membranes
buck-washing
cameraobscura
carotis interna arteria
castellana
characteristicsb
cheeze
classical political economics
contract for fixed output
crotarbital
deselecting
dimne
direct out of pocket expenditures
dtac
duplex house
eclectic medicine
enantiotropic change
extrusives
flodge
full court
gamma-ray constant
gastric glands
get the goods on
give someone the horrors
harp on
HLVS
hPLD1
hydranencephaly
hydromechanical drive with outer ramification
individual businesses
indo-europeanist
inertial stabilizer
intermediate cooling medium
iodoxamic acid
jolif
kapa'a
laswell
lead coulometer
least-drag body
lithium acetylide
mantelpiece
maraschino liqueur
massa
Misquah Hills
multi-taskers
multi-variable function generator
Nukagenin
object blindness
pass up
plasma protamine paracoagulation time
plea of superior order
pliobond
posteen
prutot
raise old Harry
ram feeder
rate of wearing
reedbirds
rolling-up curtain weir
root word
sail over
Sampeyre
satellite navigation earth stations
sclerophyllous shrub
seal by precision fit
send up a kite
settlement dust counter
sheer lawn
shives
Somonal
stamp on
stereotypical dualism
streels
suburban population
swickert
system assurance program
tear-jerkings
threephase exciter
TP (trip and monitoring system)
transhipment bond note
trevaskis
Ulmus bergmanniana var. lasiophylla
unexecuted agreement
us secretary of state
Vila de Manica
Wehnelt electrode
William Randolph Hearst
woodwindist
Yakamul
Yaroslavl'
ystrawed
Zeppelin, Count Ferdinand von