clypeasteroid (plural clypeasteroids)
Any echinoderm of the order Clypeasteroida, of sand dollars.

This is Scientific American's 60-Second Science. I'm Karen Hopkin. Thisll just take a minute. Any school kid can tell you that comets are made of ice. That frozen water burning off is what gives comets their characteristic tails. But asteroids were g

发表于:2018-12-02 / 阅读(87) / 评论(0) 分类 Scientific American(四)月

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. If we want to learn more about our planet and other planets in the universe, we can get some help from stars that are long dead and gone. Thats what U.

发表于:2019-01-08 / 阅读(92) / 评论(0) 分类 Scientific American(一)月

The government's point man for responding to the Gulf Coast oil spill disaster says he expects BP to offer a new improved containment plan as early as today. NPR's Neda Ulaby has more. Admiral Thad Allen of the US Coast Guard appeared on CBS's Face T

发表于:2019-01-08 / 阅读(86) / 评论(0) 分类 2010年NPR美国国家公共电台6月

LOS ANGELES, April 8 (Xinhua) -- NASA's Wide-field Infrared Survey Explorer (WISE) has discovered a rare asteroid that traces out a horseshoe shape relative to Earth, the Jet Propulsion Laboratory (JPL) said on Friday. Unlike most near-Earth asteroid

发表于:2019-01-11 / 阅读(96) / 评论(0) 分类 英语新闻

By David Gollust Jerusalem 01 August 2007 U.S. Secretary of State Condoleezza Rice held talks with senior Israeli officials Wednesday to try to restore momentum to the Israeli-Palestinian peace process. She came to Jerusalem from Saudi Arabia, where

发表于:2019-01-13 / 阅读(145) / 评论(0) 分类 2007年VOA标准英语(八月)

By Sabina Castelfranco Naples 19 April 2006 Chouimet Amirouche, front at center, and Mellouk Djelloul, rear at center with his face covered, both of Algeria, are detained by Italian police officers, i

发表于:2019-01-13 / 阅读(164) / 评论(0) 分类 2006年VOA标准英语(四月)

NASA: Humans Could Visit Asteroid in 2021 These chunks of ancient space rocks hold clues about the formation of the universe, pose threats to our planet, and present new territory for explorers. NASA's proposed asteroid mission is a logical next leap

发表于:2019-01-14 / 阅读(81) / 评论(0) 分类 VOA标准英语2013年(六月)

ARI SHAPIRO, HOST: A giant asteroid slammed into Earth about 65 million years ago. That impact killed off the dinosaurs. And now scientists say it had another major effect on the planet, one that's a cautionary tale. Here's NPR's Nell Greenfieldboyce

发表于:2019-01-16 / 阅读(88) / 评论(0) 分类 2018年NPR美国国家公共电台5月

NASA Launches Mission To Retrieve Ancient Asteroid Dust play pause stop mute unmute max volume 00:0003:12repeat 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.

发表于:2019-01-16 / 阅读(97) / 评论(0) 分类 2016年NPR美国国家公共电台9月

NASA's Other Asteroid Mission: Grab A Chunk And Put It In Orbit Around The Moon play pause stop mute unmute max volume 00:0004:02repeat repeat off Update Required To play the media you will need to either update your browser to a recent version or up

发表于:2019-01-16 / 阅读(120) / 评论(0) 分类 2016年NPR美国国家公共电台9月

LOS ANGELES, June 24 (Xinhua) -- Near-Earth asteroid 2011 MD will whip past Earth on June 27, but will not pose any threat, NASA's Jet Propulsion Laboratory (JPL) said on Friday. The asteroid will pass only 12,000 kilometers (7,500 miles) above the E

发表于:2019-01-20 / 阅读(108) / 评论(0) 分类 英语新闻

By Paul Sisco Washington, DC 07 July 2006 watch Asteroid report A major asteroid passed by the Earth this week, and another is heading this way. An asteroid visible in the night sky Asteroids are similar to comets and meteors. But they are larger, m

发表于:2019-01-20 / 阅读(155) / 评论(0) 分类 2006年VOA标准英语(七月)

By Mike O'Sullivan Los Angeles 03 July 2006 A large asteroid, known as 2004 XP14, raced past the Earth early Monday. Scientists say it posed no threat to the planet, but serves as a reminder of the hazards encountered in space. -------- The rocky sp

发表于:2019-01-20 / 阅读(141) / 评论(0) 分类 2006年VOA标准英语(七月)

By Steve Herman New Delhi 14 August 2007 An electrician checks the decorative lights on the Indian gate, at the joint border check post, Wagah, India, 13 Aug 2007 Sixty years ago, India and Pakistan celebrated their newly won independence from Britis

发表于:2019-01-26 / 阅读(295) / 评论(0) 分类 2007年VOA标准英语(八月)

By Sean Maroney New York 20 June 2007 In 1967, Israel countered what it saw as a threat of annihilation by its neighbors and defeated three Arab armies in six days. As a result, Israel nearly tripled the terroritory under its control and began an occ

发表于:2019-01-31 / 阅读(119) / 评论(0) 分类 2007年VOA标准英语(六月)

BEIJING, Nov. 7 (Xinhuanet) -- A huge asteroid will pass closer to Earth than the moon on Tuesday, but experts say there is no cause for alarm. Asteroid 2005 YU 55 will pass about 300-thousand kilometers from the earth. The giant space rock is about

发表于:2019-02-08 / 阅读(89) / 评论(0) 分类 英语新闻

BEIJING, June 28 (Xinhuanet) -- A truck-sized asteroid passed over the Atlantic Ocean within 7,500 miles of the Earth on Monday, according to NASA's Jet Propulsion Laboratory. The space rock, called asteroid 2011 MD, is the second space rock to zip e

发表于:2019-02-15 / 阅读(93) / 评论(0) 分类 英语新闻

NASA has announced that an Asteroid will pass closer to Earth than the TV satellites that surround the planet. NASA says that the celestial visitor has no chance of impacting the Earth and is known as 2012 DA14. A group of amatuer astronomers discove

发表于:2019-02-21 / 阅读(93) / 评论(0) 分类 英闻天下

Meanwhile, a 45-meter wide asteroid has hurtled safely past earth after it came within 27-thousand kilometers, making it the closest known flyby for a rock of its size. The asteroid, named 2012 DA14 came closer to earth than many communication and we

发表于:2019-02-21 / 阅读(85) / 评论(0) 分类 英闻天下

1. In Democracies and its Critics, Robert Dahl defends both democratic value and pluralist democracies, or polyarchies. Dahl argues convincingly that the idea of democracy rests on political equalitythe equality capacity of all citizens to determine

发表于:2019-02-25 / 阅读(143) / 评论(0) 分类 GRE英语
学英语单词
accelerating convergence
actuating member
acute toxicity classification
aerodynamics of composite bodies
agropyrene
Alhondiga
ARVL
attitude rate
black mouth croaker
boiler insurance
bolts and nuts
books of lamentations
boundlessly
candy-coated
capitalist private property
charging choke coil
clathrin triskelion
club funguss
commercial access provider
computer micrographics
conservatee
cotton-tree
crane post
double whip
eaglens
EDO DRAM
elastically positioned wheelset
Euerdorf
evaluation of assignment statement
evilful
fatherling
final squint angle (fsa)
Flores Sea
gearjammers
graph traversal technique
Gregory Goodwin Pincus
guinee
happens on
helitron oscillator
hydroxycinnamate
ignorancia
irregular gout
isoformgene
jaenisch
job freeze
jobs-cuts
landing direction indicator (ldi)
least square regression
lighting cue
limiter shunt
low relief structure
manipulatees
march unit
mecodium oligosorum h. ito
multilocular bladder
Nasdaq stock market
no'th
nonexistences
NSC-177023
open plan school
passenger car tyres
petronian Law
Pierre Corneille
pisc-
plant account
plastometer test
poecilogony
prephenates
primakoff effect
printed off
punch register system
pussy bandits
raising with lifting vessels
renon-delille(syndrome)
retirement plan
Rubus ourosepalus
scheme competition
second-order transition
sibenik (sebenico)
silicon unijunction transistor
slow neutron counter
small - scale map
splanchnocyte
sport team
squitted
station control unit
Ste-Croix-Volvestre
sunburn cream
The cross on his breast and the devil in his heart.
the tune the cow died of
thermal break-off
threadsafe
timmia megapolitana hedw.
toroidal grating monochromator
Torrevieja
uniform major section
unstaining
uro-azotometer
utility belt
verticillium lecanii
video tape splicer
weismanns