标签：雷达 相关文章
You may have spotted V-shaped squadrons of geese heading south this fall. But for many migrantslike smaller songbirdsnighttime is the right time, when it comes to migration. Winds are gentler. And darkness helps them avoid airborne attacks. Of course
2016年Scientific American(十二)月
华盛顿领空遭无人机入侵 空域安全存在漏洞 When Florida Postal Service worker Doug Hughes landed his homemade gyrocopter on the west lawn of the U.S. Capitol, in a daring bid to deliver a political message to the lawmakers, the securi
VOA标准英语2015年(八月)
A Chinese-made self-driving container straddle carrier, said to be the first of its kind in the world, is now undergoing testing at a port in Shanghai, reports China Central Television. A container straddle carrier is a freight carrying vehicle that
2018CRI中国国际广播电台
Radar Scans Detail North Korean Nukes North Korea has promised to close its underground nuclear test site at Mount Mantap later this month. Shortly thereafter, President Trump is set to meet North Korea's leader Kim Jong-un in Singapore. 朝鲜已承诺
2018年科学美国人5月
Full coverage: Air Algerie Flight Lost Radar Contact after Takeoff French President Francois Hollande has issued a statement, saying Air Algerie flight AH-5017 with 116 people onboard, crashed in Mali, near the border with Burkina Faso. The statement
CCTV9英语新闻2014年07月
Full coverage: Air Algerie Flight Lost Radar Contact after Takeoff French President Francois Hollande said Friday there were no survivors of the downed Air Algerie jetliner, and one of the aircrafts two black boxes has been found in the wreckage. Fre
CCTV9英语新闻2014年07月
Kam: Okay, the purpose of our meeting today is to listen to some ideas for our new advertising campaign. Gina, take it away. Gina: Thanks, Kam. Im going to talk today about outdoor advertising. I know that its a new area for us and it hasnt been on o
地道美语播客
Commercial jets pumps out some 700 million tons of CO2 a year, about 2 percent of global emissions. That jet exhaut helps warm the planet, especially in the Arctic, which is especially unfortunate for future fliers because climate changes may screw u
Scientific American(四)月
China will begin its mission to land on the moon on Monday. The Change-3 lunar probe will be launched at 1:30 a.m. local time from the Xichang Satellite Launch Center. The rocket system has functioned perfectly in all four general inspections. Everyt
CCTV9英语新闻2013年12月
Erik: Why are you wearing that getup ? Juliana: Im trying to stay under the radar . I dont want to create a mob by going outside without a disguise . People are going to recognize me. Erik: So? Are you trying to tell me that you think youre famous af
地道美语播客
In 1989, the space shuttle Atlantis launches the Magellan Probe toward / Venus. After a journey of 15 months, Magellan uses radar eyes to peer through the clouds from orbit. Watching form earth is Ellen Stofan. When you have that ability to pick up a
自然百科2012年
And its here in a freezer that Messenger will encounter another puzzle: can ice exist on a planet so close to the sun? It's only when the first radar observations to the surface of Mercury were obtained back in the 90s that it was discovered that Mer
自然百科2012年
By Al Pessin Washington 03 April 2006 The U.S. Defense Department says it is possible Iran has made improvements in its missile forces, but a spokesman has also warned that Iran has exaggerated its ca
2006年VOA标准英语（四月）
You never guess the dangers on the ground from orbit, except maybe for this, massive, double-barreled storms hovering above the poles. Of this, what we called dipole features trailing around, we don't know what, really what they are, but the whole fe
自然百科2012年
Lets nuke it in the microwave, we often say as we pull a frozen dinner out of the freezer. That figure of speech seems to express the fact that our experience with nuclear power and with microwaves goes back only a few years, while our experience wit
英语时差8，16