查询词典 NASA

Based on introduction to several ranging signal systems in NASA and ESA,the deep space ranging signal systems are analyzed and compared,and the primary ideal is proposed.

深空测控通信中，接收信号微弱，信号时延巨大，使得深空测控与地球轨道航天器的测控有很大差异，选择合理的测距信号体制，对深空测控系统具有极其重要的意义。

Photo Gallery: Stars An image taken by the Hubble Space Telescope gives the clearest view ever of the Quintuplet star cluster, a massive collection of young stars 25,000 light-years from Earth but only a hundred light-years from the center of the Milky Way.

Photograph courtesy NASA 意译：一幅来自哈勃望远镜获取如此清晰的图片――五个一组星的丛生，这是一组年轻的星群距离地球约25000光年但是只有一百光年从中心到Milky Way。。

"We've suspected for years that turbulence heats the solar wind," says Fouad Sahraoui, lead author of the paper and a visiting NASA Fellow from the Centre National de la Recherche Scientifique in France.

"我们已经怀疑扰动加热太阳风很多年了"，Fouad Sahraoui，该论文的首席作者说，"现在我们已经得到了关于该过程的详细观测数据。"

"What we want to do, though, is refurbish the Hubble so that it can operate as long as possible," Altman said during a series of NASA interviews released on Monday.

阿尔塔曼在美国宇航局公布的一系列采访中说：我们想做的是维修哈勃太空望远镜，尽量延长它的运行时间。

At a press conference Tuesday at the American Geophysical Union fallconference, scientists from NASA's Lunar Reconnaissance Orbiter alsohinted at possible organics locked away in the lunar regolith .

在新闻发布会上周二举行的美国地球物理联合会秋季会议上，来自美国宇航局的科学家对月球勘测轨道飞行器也暗示可能有机物锁在月球的风化。

After Apollo, NASA focused on creating a reusable ship to provide regular access to space: the space shuttle.

阿波罗之后，国家航空局致力于创建一个可回收的航天器去提供正当的有权使用太空：航天飞机。

Barack Obama has detailed a comprehensive space plan that includes $2 billion in new funding to reinvigorate NASA.

巴拉克-奥巴马有了一份详细的整体太空计划，会用20亿美元的新资金重振美国航空航天局。

Seven astronauts and NASA's shuttle Discovery are home for the holidays after a successful mission to rewire the International Space Station ...

七名宇航员和航天局的航天飞机为假期回家后发现是一个成功的使命铺国际空间站ISS

NASA's Spitzer Space Telescope finds a delicate flower in the Ring Nebula, as shown in this image.

斯比策空间望远镜在星云环里找到一朵精致的花朵，如图所示。

"Partially reusable rocket -launched vehicle developed by NASA to go into Earth orbit, transport people and cargo between Earth and orbiting spacecraft, and glide to a runway landing on Earth."

由美国国家航空暨太空总署研制的进入地球轨道，为地球和轨道运行航天器运送人员和货物，并能滑翔回地面着陆的可部分重复使用的火箭助推的运载机。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐