单词：circular orbital velocity
单词：circular orbital velocity 相关文章
Unit 4 Free-time Activities Ice Fishing(E) A boy wanted to go ice fishing,He'd read many books on the subjectand finally,after getting all the necessary tools togetherhe made for the nearest frozen lakeAfter positioning his stool,he used a drill to m
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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
2014年VOA慢速英语(十)月
Virgin Spaceship Crash Raises Questions 维珍宇宙飞船失事引发诸多问题 WASHINGTON Plans to fly tourists to the edge of space could be delayed after Friday's crash of Virgin Galactic's SpaceShipTwo during a manned test flight. It is the se
VOA标准英语2014年(十一月)
city 城市 cigar 雪茄 cigarette 香烟 circle 圆圈 circular 圆形的
用听的背单词-基础2000MP3(a-g)
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
VOA双语新闻 2014年10月
星级典句： 第一句：But the service will be continued. 但是我们的服务不变。 A: Have you received our circular? 您收到我们的通知了吗？ B: No. I haven't seen any letter from you. 没有。我没看到任何发自你方的信件
天天商务口语
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
(科普英语)Earth and Sky
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
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This is the VOA Special English Agriculture Report. A round barn in Illinois American farmers traditionally keep their animals and equipment in barns that are rectangular, longer than they are wide. But as many as one thousand barns in the Midwest a
VOA慢速英语2008年（一）月
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
2011年VOA慢速英语(九)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
VOA标准英语2012年(一月)
With Failed Launch, US Private Space Industry Suffers Setback 火箭发射失败 美国私人航天受挫 Wednesday's successful launch of a Russian space vehicle taking supplies to the International Space Station was in sharp contrast to the explosi
VOA标准英语2014年(十月)
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
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BEIJING, March 16 (Xinhua) -- As epidemic season for the Zika virus draws near, schools at all levels should strengthen precautions, a circular issued by the Ministry of Education (MOE) said Wednesday. According to the circular, anti-mosquito campaig
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By David McAlary Washington 12 July 2006 Astronaut Mike Fossum (on arm)installs the International Space Station's railcar-like mobile transporter U.S. space shuttle astronauts are on their third spacewalk since Saturday, this time to practice method
2006年VOA标准英语（七月）
The Central Military Commission (CMC) has planned to gradually terminate all paid services in the military in three years, according to a CMC circular recently issued. 中央军委近日发布的通知指出，计划3年内逐步停止军队和武警部
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BEIJING, Dec. 27 (Xinhua) -- The disciplinary watchdog of the Communist Party of China (CPC), as well as the government's supervisory authority, have called for efforts to halt extravagance during the upcoming holiday season. The use of public funds
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BEIJING, March 12 (Xinhua) -- China's Ministry of Finance (MOF) has revised a list of major items of technical equipment enjoying import-tax exemption, according to a circular issued by the body on Monday. Chinese manufacturers of items of large tech
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BEIJING, April 16 (Xinhua) -- The Ministry of Health (MOH) said on Monday that it will upgrade a service network for the prevention and treatment of occupational diseases in line with a newly-amended law. China's top legislature adopted an amendment
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BEIJING, March 14 (Xinhua) -- China will change three members of the central bank's monetary policy committee, according to a circular released Wednesday by the State Council, or the Cabinet. The circular said the State Council has approved the appoi
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