平均地球轨道速率

ANNOUNCER: EXPLORATIONS -- a program in Special English by the Voice of America. (MUSIC) Neil Armstrong with the X-15 Today, Doug Johnson and Frank Oliver tell about the first airplane that flew out of the Earth's atmosphere. It was designed to test

发表于:2018-12-07 / 阅读(137) / 评论(0) 分类 VOA慢速英语2007年(九)月

Questions for NASA after Rocket Explosion 火箭爆炸后美国国家航空航天局面临的问题 Unmanned Antares rocket is seen exploding seconds after lift off from a commercial launch pad in this still image from NASA video at Wallops Island, V

发表于:2018-12-08 / 阅读(116) / 评论(0) 分类 2014年VOA慢速英语(十)月

EXPLORATIONS - High and Fast: the X-15 Reached the Edge of Space EXPLORATIONS -- a program in Special English by the Voice of America. Today, Doug Johnson and Frank Oliver tell about the first airplane that flew out of the Earth's atmosphere. It was

发表于:2018-12-16 / 阅读(102) / 评论(0) 分类 2012年VOA慢速英语(十)月

美国火箭爆炸,私营航天产业的挫折 Wednesday's successful launch of a Russian space vehicle taking supplies to the International Space Station was in sharp contrast to the explosion of a private U.S. cargo space craft shortly after it's

发表于:2018-12-19 / 阅读(119) / 评论(0) 分类 VOA双语新闻 2014年10月

Dictation Instructions Listen to the following passage or together the passage will be read to you four times. During the first reading which will be read in normal speed .Listen and try to understand the meaning . For the second and third readings t

发表于:2018-12-30 / 阅读(94) / 评论(0) 分类 英语六级听力练习集锦

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(113) / 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(264) / 评论(0) 分类 (科普英语)Earth and Sky

One evening I drove my husbands car to the shopping mall. 一天晚上,我开着丈夫的车去购物。 On my return I noticed that how dusty the outside of his car was and cleaned it up a bit, when I finally entered the house, I called out, The w

发表于:2019-01-08 / 阅读(138) / 评论(0) 分类 英语小短文

美国私企飞船与空间站对接 WASHINGTON, Jan. 12 (Xinhua) -- A commercial spacecraft, operated by U.S. space company Orbital Sciences Corp., docked with the International Space Station (ISS) on Sunday morning on its first official cargo resup

发表于:2019-01-09 / 阅读(147) / 评论(0) 分类 英语新闻

SCIENCE IN THE NEWS - Space Junk Threatens Earths Orbital Environment JIM TEDDER: This is SCIENCE IN THE NEWS, in VOA Special English. Im Jim Tedder. KATHERINE COLE: And Im Katherine Cole. Today, we tell about an ever increasing number of objects in

发表于:2019-01-12 / 阅读(179) / 评论(0) 分类 2011年VOA慢速英语(九)月

Hawking, Zuckerberg to Search for Life in the Universe 霍金、扎克伯格寻找外星生命 It is one of the oldest questions ever asked: Are we alone or is there other life out in the Universe? Last week, an international team of scientists and b

发表于:2019-01-12 / 阅读(193) / 评论(0) 分类 2016年VOA慢速英语(四)月

Global Warming Could Delay Next Ice Age The next ice age could be delayed by tens of thousands of years due to excessive amounts of heat-trapping carbon dioxide in the atmosphere, which disrupts Earths natural cycle of warming and cooling, according

发表于:2019-01-13 / 阅读(139) / 评论(0) 分类 VOA标准英语2012年(一月)

But the faster you go, the more time dilates. 但是行驶的速度越快,时间的膨胀越多。 For astronauts orbiting the Earth for 800 days, it starts to add up. 如果宇航员们环绕地球800天,其影响就会明显。 But what affects

发表于:2019-01-17 / 阅读(101) / 评论(0) 分类 TED演讲教育篇

Have you ever daydreamed about traveling through time, perhaps fast forward in the centuries and seeing the distant future? 你曾白日梦过穿越时空吗?或者穿越到几百年之后及看到遥远未来? Well, time travel is possible, and

发表于:2019-01-17 / 阅读(104) / 评论(0) 分类 TED演讲教育篇

The amount of debris orbiting the Earth has reached a tipping point for collisions, which would in turn generate more of the debris that threatens astronauts and satellites, according to a US study released on Thursday。 NASA needs a new strategic p

发表于:2019-01-30 / 阅读(131) / 评论(0) 分类 实用英语

Hello and Welcome to News and Reports on China Radio International. In This Edition Chinese experts express concerns over a possible new round of quantitative easing monetary policies by the United States. US attorney-general says investigation is on

发表于:2019-02-28 / 阅读(189) / 评论(0) 分类 2011CRI中国国际广播电台

Did you ever dream of digging a hole so deep it came out the other side of the earth? Let's play that game again, using a little physics. First we have to imagine that our tunnel is lined with super-heat-resistant material so we can pass through laye

发表于:2019-03-06 / 阅读(200) / 评论(0) 分类 英语时差8,16

Last time we imagined a tunnel through the center of the earth. If such a thing existed, you could step into one end, fall all the way to the other side, and step out. Gravity would cause you to pick up almost exactly as much speed on the way down as

发表于:2019-03-06 / 阅读(183) / 评论(0) 分类 英语时差8,16

Zippy Aliens 爱因斯坦的狭义相对论认为物体的运动速度越接近光速,时间越慢。在1971年,物理学家理查德基廷和乔伊哈夫勒验证了这个假想。他们将4个极为精确的原子钟放在一架普通航行的飞

发表于:2019-03-09 / 阅读(171) / 评论(0) 分类 英语听力文摘 English Digest

The Front End of the Earth 火流星看上去非常明亮,像条闪闪发光的巨大火龙,发着沙沙的响声,有时还有爆炸声。有的火流星甚至在白天也能看到。火流星的出现是因为它的流星体质量较大(质量大

发表于:2019-03-09 / 阅读(181) / 评论(0) 分类 英语听力文摘 English Digest
学英语单词
Aboabo
absorber control
acyanotic chronic bronchitis
alternating copolyester
ammonium nitrate trinitrotoluene explosive
anticipation survey
aureine
away with the fairies
back-rake
back-with
be against law
beatas
beta scintillator
bioturbated
Bis-bil
Bouse Wash
bowen's
broadpiece
certifying
chocolate mass mixing and kneading machine
cobalt-60 pearls
collective organization
control software
conveyer canvas
Couiza
cynipid
decompression stress
default letter
demya
Dening
diffie-hellman algorithm
directive radio station
discrete topological space
edward youngs
estec (european space technology center)
field ion microscope
flash mobs
FoIP
fullerane
fumonyoh
Gada, R.
given me a hand
hand in hand chain
heat injection noise
Heracleum candicans
hogsett
horizontal locking bed
hyperythrum
initial velocity current
interchondral joints
jarbua terapon
jordin
jumbles
justiczs
knee-trembler
kuebler
lerned
m. longus capitis
made - up story
marine contamination
medium standard frequency
military expansion
monitoring device
multi-storage system
musalla
mysophiles
nabadial
nerita polita
never-to-be
nice-looking
non faceted solid liquid interface
NORDUnet
oil free
ovitrap
peak-holding circuit
PHVA
physical fault
Pindi Saiyidpur
plain-sawing
power system dispatching
pukefaces
put someone off their stroke
reconceptualise
Rhododendron adenopodum
Rieder cells
rin
sir alexander robertus todds
slideway grinder
south atlantics
stall sequence
stockjobber
tainly
tension of articulation
trade editions
trillionairess
unitary connection
variable length code
venerating
vernacular word
void distribution
wardsmen
zinc cleaner tailing