地球自转速率

play pause stop mute unmute max volume 00:0002:36repeat repeat off Update Required To play the media you will need to either update your browser to a recent version or update your Flash plugin. The mayor of Amatrice, which is located in central Italy

发表于:2018-12-02 / 阅读(117) / 评论(0) 分类 CNN美国有线新闻2016年8月

Pre-Listening Vocabulary revolution: to go around something (Earth revolves around the Sun.) rotation: the spinning of something (Venuss rotation is backwards.) axis: a real or imaginary line that something rotates on retrograde: in a backwards movem

发表于:2018-12-19 / 阅读(58) / 评论(0) 分类 Facts-事实

CNN News from here Atlanta, Georgia straight to your classrooms, Im Carl Azuz, this is CNN Student News. Today were starting something called a payroll tax. Heres the deal on the payroll tax from A to Z. Americans have been getting a break on their f

发表于:2018-12-20 / 阅读(78) / 评论(0) 分类 CNN2011年(十二)月

Years Ago, The Year Was 400 Days Long 多年前,一年长达400天 Don: Yaeuml;l, do you notice the days changing length over the course of the year? 东:雅瑶,你有注意到一年中每一天的长度在改变么? Yaeuml;l: Sure, Don, it s

发表于:2018-12-28 / 阅读(59) / 评论(0) 分类 初学者听力文摘精选

The massive earthquake that struck Chile in February 2010 might have shortened Earth's day by 1.26 microseconds, according to calculations by a NASA scientist. An EarthSky Facebook friend asked us how. And the answer is for the day to get shorter, Ea

发表于:2018-12-28 / 阅读(56) / 评论(0) 分类 初学者听力文摘精选

Inventions for Exploring Space: Artificial Satellites Sputnik Ⅰ was the first artificial satellite. It can be described as an aluminium 1 sphere with a diameter 2 of 58 centimetres and weighing 83.6

发表于:2018-12-30 / 阅读(89) / 评论(0) 分类 英语沙龙2004全年合辑下

A Stationary Satellite, part 2 A geostationary satellite orbitsthe planet at the same rate as the planet rotates, so the satellite is always over the same patch of ground. Cool! you say. Id like to have one of those about twenty feet over my house. S

发表于:2018-12-31 / 阅读(65) / 评论(0) 分类 英语听力文摘 English Digest

Galactic Rotation 银河系自转 Astronomers calculate there is ten times more matter in our Milky Way galaxy than we can actually see. Discover how the orbital motions of stars in the galaxy reveal dark matter -- on today's Earth and Sky. JB: I'm Joel

发表于:2019-01-02 / 阅读(196) / 评论(0) 分类 (科普英语)Earth and Sky

City Code - Some foreign countries require you to dial a city code before the phone number you are trying to reach. Clamp - A circuit that removes the energy dispersal signal component from the video

发表于:2019-01-03 / 阅读(78) / 评论(0) 分类 电信英语

Gain - This is an increase in signal power, due to a boost from an electronic device. Garbage - These are unwanted characters that appear because of either incorrect settings or noise. Gate - These ar

发表于:2019-01-03 / 阅读(103) / 评论(0) 分类 电信英语

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Albert Einstein wins again. A new study has confirmed another prediction of his theory of general relativity. The corroboration appears online in the jou

发表于:2019-01-08 / 阅读(87) / 评论(0) 分类 Scientific American(五)月

Mercury 水星 Which planet is the closest to the sun in the solar system? 太阳系中哪颗行星离太阳最近? It is Mercury. It is also the smallest planet in the solar system. 水星。它也是太阳系中最小的行星。 How small is Mer

发表于:2019-01-10 / 阅读(96) / 评论(0) 分类 与美国小学生一起学英文第12册

Airlines, trading floors and technology companies are braced for chaos today as world timekeepers prepare to add a leap second to global clocks. 世界钟表今天要给全球的钟表加一闰秒,因此航班、交易所、科技公司正在为即将

发表于:2019-01-16 / 阅读(105) / 评论(0) 分类 阅读空间

Well, the story of the earth spin goes back all the way to the origin of the solar system, four and a half billion years ago. The solar system started out as a cloud of gas and dust. And these gas and dust clumped together to form the sun and the var

发表于:2019-01-22 / 阅读(93) / 评论(0) 分类 自然百科2009年

Easily confused by this idea, there has a big thawed iron inner core, so that I think it's just the bar magnet, just permanent magnet frozen in nad, and that's where causes all the magnetic field. But it's too hot inside the Earth, that can't happen

发表于:2019-01-22 / 阅读(83) / 评论(0) 分类 自然百科2011年

But as it grew, the Khmer Kingdom faced the stumbling block. When the monsoon finished each year, the fish and water would vanish. So each year, the inhabitants were plunged into drought and hunger. The Khmer rules off the challenge magnificently. Th

发表于:2019-01-22 / 阅读(85) / 评论(0) 分类 自然百科2010年

Many aspects, like its geological past, are a mystery. But some things we do know, this lonely planet has a strange sense of keeping time. Once you arrive, you have to reset your watch for a time zone like no other. It has such an unusual orbit and r

发表于:2019-02-05 / 阅读(67) / 评论(0) 分类 自然百科2012年

One of the Federal Reserves rate-setters has described the case for a further increase in short-term interest rates as compelling, arguing that the trends for employment and inflation are in the right direction. 美联储(Fed)利率制定者之一称,

发表于:2019-02-05 / 阅读(72) / 评论(0) 分类 英语新闻

The US is on the verge of meeting most of the economic conditions the Federal Reserve has set to increase interest rates next month, according to a member of the rate-setting Federal Open Market Committee. 负责制定利率的联邦公开市场委员会

发表于:2019-02-09 / 阅读(106) / 评论(0) 分类 实用英语

Earth's days are getting longer but you're not likely to notice any time soon it would take about 6.7 million years to gain just one minute, according to a study published last Wednesday. 据上周三公布的一份报告显示,地球的白天时间正

发表于:2019-02-16 / 阅读(77) / 评论(0) 分类 英语新闻
学英语单词
all-through visibility tester
allantochorion
alternating bending
ambarka
amelotin
animal tester
Antiochus IV Epiphanes
arm of flesh
atomic attack
autovulcanizing stock
bank cleaner
beech oil
bisexual gland
boutonniered
Cacalia hastata
chauenge
choice list
citrus grass
coaxial jack
complete deck
confanon
connor
constructable
corrugated floor
craspedophytes
cruciation
current outlays
daquille
data enable
date last use
dawess
derivative thermogravitimetric analysis
dome collar
Dortmund-Ems Canal
double span
dran
E. I. C.
effective wave slope
enteric pill
faulted upfold
fertilizer the soil
fly-catcher
four-courses
fruit system
gemmipary
gillispie
gortmaker
Haselbach
hawserlaid
hells to pay
high speed turning tool
holy dollar
HPES (human power evaluation systems)
hurumite
ignean
incompetent evidence
indoacetamide
Londang, Tg.
Loudoun
malacanthus latovittatus
materializing
meander loop
megacomplex
methallyl chloride
mid man
name-change
optical guidance system
orifice viscosimeter
orthojoaquinite- (ce)
pectinations
platydema sauteri
poison-anise
predispose someone to
protein code
pseudechidna brummeri
recirculation outlet loop
rejoicings in the law
rhamnogalacturonase
roll angle/bank angle
rosee
Rotliegende
salt hunger
sea-urchin cactus
selenoxo
siphonal
small hook needle
spot-welding equipment
step-sister
sulge pump
swatched
swelter
teffs
Tetrahydroserpentine
the sterner sex
Thiohalocapsa
Torigakubi-misaki
transanhydrisation
undulatin current
vibration transmissibility
waldmeisters
wansie
warehouse purchase