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NASA Successfully Tests Hypersonic 1 Jet Three years after its first test flight ended in an explosion, NASA on March 27 successfully launched an experimental jet that the agency believes reached a re

发表于:2018-12-05 / 阅读(76) / 评论(0)

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Now the speed of light is a very,very big number. 光速是个很大的数字 So if we just take a small amount of mass, 所以只要一点点质量 you get a huge amount of energy. 就含有大量能量 And that's the energy which actually powers ou

发表于:2018-12-07 / 阅读(135) / 评论(0)

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Unit 6 TEXT I Atomic Cars Text Every motorist dreams of a car of the future that does not have to be refuelled every few hundred miles, a car that will cost little to run because there is no outlay on

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Linus Paulingby Linda BaxterLinus Pauling was the only person who has ever won two (unshared) Nobel Prizes: for Chemistry in 1954, and a Nobel Peace Prize in 1962. He is also known as the vitamin C man. Who was Linus Pauling and what did he do?Linus

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Iran Launches Rocket, Trump Seeks to Test Nuke Deal Iran announced Thursday that it had successfully launched a rocket carrying a satellite into space. State television in Iran claimed the Simorgh rocket can carry a 250- kilogram satellite as far as

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World's First Nuclear Fusion Reactor 50 Percent Complete At the Geneva Superpower Summit in November 1985, American President Ronald Reagan met with the Soviet Union's General Secretary Mikhail Gorbachev. 在1985年11月的日内瓦超级大国首脑会

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VOICE ONE: This is Steve Ember. VOICE TWO: And this is Shirley Griffith with the VOA Special English program, EXPLORATIONS. Today, we report on some of the early research in the development of rockets

发表于:2019-01-07 / 阅读(107) / 评论(0)

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Todd: Jonathan we are talking about conspiracy theories. What about the one where the sound? That when the rocket lands, they have actually audio of the rocket landing and you can't hear the rocket engine, and the rocket engine should be making a rea

发表于:2019-01-20 / 阅读(66) / 评论(0)

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Obama Arrives in South Korea for Nuclear Summit

U.S. President Barack Obama has arrived in South Korea for the Nuclear Security Summit which starts Monday. Mr. Obama landed at a U.S. air base south of Seoul early Sunday local time and is expected to meet with South Korean President Lee Myung-Bak l

发表于:2019-02-04 / 阅读(84) / 评论(0)

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Science and technology 科学技术 Reusable spacecraft 可重复使用的航天器 Jet-set rocket-man 乘喷气式火箭的乘客 A small British firm is working on a nifty new jet-rocket hybrid engine 英国一家小公司正在研发一款轻巧的新

发表于:2019-02-05 / 阅读(62) / 评论(0)

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North Korean leader Kim Jong-Un has promised to put more satellites in space, even as the international community prepares to punish his regime over a long-range rocket launch just last week. 朝鲜领导人金正恩近日承诺会向太空发射更多

发表于:2019-02-06 / 阅读(97) / 评论(0)

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Ariane 5 launch aborted due to technical hitch

BEIJING, Apirl 1 (Xinhuanet) -- An Ariane rocket launch of two communications satellites was aborted Wednesday after a technical hitch at the scheduled moment of liftoff in French Guiana on Wednesday. According to Arianespace, the Ariane 5 rocket's V

发表于:2019-02-06 / 阅读(119) / 评论(0)

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模仿句子：The tensions in the Korean Peninsula have dominated headlines since February when North Korea tested another nuclear warhead. It also tested new rocket technology ostensibly to send satellites into orbit, although no one abroad seemed

发表于:2019-02-16 / 阅读(64) / 评论(0)

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On the morning of July 16, 1969, Neil and his two fellow Apollo 11 crewmen rose at 4:15 A.M. They had steak and eggs for breakfast, the same breakfast all astronauts had before a flight. The night before a special visitor had arrived for dinner to wi

发表于:2019-02-21 / 阅读(72) / 评论(0)

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2016年CRI Japan Imposes Sanctions on North Korea Over Rocket Launch

North Korea's most recent satellite launch was seen by Washington as cover for the development of ballistic missile technology that could be used to deliver a nuclear weapon. On Wednesday, US ally Japan reacted to the launch, with Japanese Prime Mini

发表于:2019-02-21 / 阅读(76) / 评论(0)

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