n. 古树木学
(palaeodendrology 的复数)

For many foreigners, part of the attraction of China is its mysterious and ancient splendor. But what attracts Chinese people? It was something that Paloma Sanchez, a certified GIA gemologist from Spain, had to learn through first-hand experience. Pa

发表于:2018-12-02 / 阅读(153) / 评论(0) 分类 2016CRI中国国际广播电台

In January 2000, John Dubinski set out to calculate the final fate of our galaxy, the Milky Way, and that of our nearest neighbor, Andromeda. The Andromeda galaxy is actually falling towards the Milky

发表于:2018-12-07 / 阅读(399) / 评论(0) 分类 超大质量黑洞

It means that Silk and Ree's theory may be right and if it is also right that supermassive black holes helped trigger star formation, then it must mean that all giant black holes and their galaxies ar

发表于:2018-12-07 / 阅读(350) / 评论(0) 分类 超大质量黑洞

Four times a year, Ghez focuses the telescope on the stars of the very heart of our Milky Way. She is looking for the telltale high speeds that reveal the presence of a black hole. The center of the M

发表于:2018-12-07 / 阅读(414) / 评论(0) 分类 超大质量黑洞

In every galaxy scientists looked at, they found evidence for a supermassive black hole. NGC 3115 NGC 3377 NGC 3379 In M31 and M32 In total there is probably 20-30 or so black holes that have been fou

发表于:2018-12-07 / 阅读(440) / 评论(0) 分类 超大质量黑洞

When the results came down from the telescope he saw something that was completely unexpected. The picture from the active galaxy where he hoped to find a black hole was unreadable. NGC 1068 was just

发表于:2018-12-07 / 阅读(400) / 评论(0) 分类 超大质量黑洞

In March 2000, two astronomers made an extraordinary discovery, one that is set to overturn our understanding of how the universe formed. We're never going to see a time like this in astronomy again.

发表于:2018-12-07 / 阅读(450) / 评论(0) 分类 超大质量黑洞

But we are just one in 125 billion galaxies of different shapes and sizes spinning through space. Yet scientists haven't been able to explain how a single one of these galaxies was created. Galaxy for

发表于:2018-12-07 / 阅读(463) / 评论(0) 分类 超大质量黑洞

A supermassive black hole is quite simply gravity gone mad. An object of such concentrated matter its gravitational pull is insatiable. Nothing can escape it, not even light itself. Anything that gets

发表于:2018-12-07 / 阅读(415) / 评论(0) 分类 超大质量黑洞

This ferocious heart of brilliant hot gas is called a quasar. Scientists thought this whirling mass might be caused by a giant black hole sucking up gas and stars, literally feeding on the center of a

发表于:2018-12-07 / 阅读(352) / 评论(0) 分类 超大质量黑洞

By measuring how fast these stars were moving, he could prove if there really was a black hole at the center of an active galaxy. I picked a galaxy nearby which is called NGC 1068, an active galaxy, w

发表于:2018-12-07 / 阅读(429) / 评论(0) 分类 超大质量黑洞

When it's feeding, a giant black hole creates a bright burning gas disk around it and then for some reason, it stops feeding, leaving a dark, deadly core lurking menacingly in the center of the galaxy

发表于:2018-12-07 / 阅读(368) / 评论(0) 分类 超大质量黑洞

Lionel Andrs Messi was born on June 24, 1987 in the city of Rosario, Argentina. Everyone knows him now as the best football player in the world. In fact, a lot of people say he might become the greatest player ever. Well see about that at the World C

发表于:2019-01-01 / 阅读(251) / 评论(0) 分类 各国名人英文介绍

Tim called Howard. Tim needed help. He needed help with his golf swing. He had a bad golf swing. He was a bad golfer. Howard had a good golf swing. He was a good golfer. Will you help me improve my golf swing? Tim asked. Yes, Ill help you improve you

发表于:2019-01-02 / 阅读(120) / 评论(0) 分类 简单慢速英语阅读

Those stars don't feel the black hole. They feel the rest of the stars in the galaxy. They don't know or care that the black hole is there. If you took the black hole away from the galaxy, they would

发表于:2019-01-02 / 阅读(404) / 评论(0) 分类 超大质量黑洞

If, as it now seems, every single galaxy has a black hole at its heart, this can't be a coincidence. Perhaps black holes are an essential part of what galaxies are and how they work. No one had expect

发表于:2019-01-02 / 阅读(426) / 评论(0) 分类 超大质量黑洞

This correlation is the most important thing we've learned about supermassive black hole so far. Astronomers are always looking for correlations. Whenever you find one that's really tight like this on

发表于:2019-01-02 / 阅读(448) / 评论(0) 分类 超大质量黑洞

Silk realized that the energy from this newly formed quasar would create intense temperature changes in the surrounding gas. This would cause the gas around the black hole and its newly formed quasar

发表于:2019-01-02 / 阅读(421) / 评论(0) 分类 超大质量黑洞

BBC Learning English Weekender Poles in the media Callum:Hello, I'm Callum Robertson and this is Weekender. One of the largest groups of new migrants to Britain are Poles. In 2004 Poland entered the European Union which gave Polish people much great

发表于:2019-01-16 / 阅读(428) / 评论(0) 分类 Weekender

The road through Molesworth high country farm is now open for the summer. It closes again at Easter. Molesworth is in the northern part of the South Island. Molesworth is the biggest farm in New Zealand. It is 180,787 hectares. It has about 10,000 be

发表于:2019-02-06 / 阅读(193) / 评论(0) 分类 新西兰英语
学英语单词
2-ethylhexyloxypropyl-amine
abvoltCGS
aminothiourea
assignment of copyright
background area
be clouded
blood loss
Bochner, Salomon
broach someone's claret
bus trap
C.&E.T.
canal cell
cephalosporin N
chlorazol brown b
consumer profile
cotqueans
Countryside Alliance
crus commune
curative sera
cyper pet
diced white gourd and assorted meat soup
direct links
dniester (dnestr) r.
Dorexol
dust-proof solenoid valve
economic rationality
edit item
electron-microautoradiography(EMAR)
Elevated Temperature Drawing
engine crankshaft loading
epinephelus akaara
euglenids
farciminosis
fertile phases
fixing salt
fluoroacrylate rubber
flush cover
further normalization
gaas1-xpx laser
gooeyest
h maser
hemacytometers
indicating micrometer calipers
inspection of a line
integrity of welded joint
iodopyracetmethyl glucamine salt
Jones & C.
kuliokite- (y)
litis aestimatio
liturgical music
long stem cutting
Mayniac
medicated enema
message weight
microscope illuminator
miscolours
multi line entry
neutral-flame
normal charging current
normalisation
nothern range
osmundastrum claytonium tagawa. var. vestitum tagawa
out-of-sort
outer planar graph
ozeanite (oceanite)
patents ceased through nonpayment of renewal fees
pencil mark
phyllosticta amorphophalli
platform derrick
pradoo wood
pre - school children
predispersal seed predation
recraft
Rhynchodina
Rotch's sign
rubber-tired excavator
ruin threshola
saliency map
Saxifraga forrestii
Serfopoula, Nisis
set-ups
simplify the administrative structure
skeezahs
Skovballe
socio-economic system
Spodoptera exigua
stage head
stairway enclosure
straighties
strategic telecommunications
taking notes
thyroxinebinding globulin
time release scheme
time-tabling
to the view
turyite (hydrohematite)
unguentum sulpnuris
UPC
variable range hopping conductivity
Volchas
weight loaded governor
white swelling