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Known as the Dry Valleys, they are swept free of snow by nearly relentless katabatic winds - cold, dry air that rolls downhill toward the sea from the high altitudes of the ice sheet.

干谷还有大片冰川和冰封湖，本图是颜色校正的热成像图，由NASA的Terra卫星摄于2000年11月29日。

NASA's Limbed Excursion Mechanical Utility Robot is being designed as an inspection/maintenance robot for equipment in space.

美国宇航局的肢游览机械实用机器人目前正在设计的检查/维修机器人在太空中的设备。

NASA's Limbed Excursion Mechanical Utility Robot is being designed as an inspection/maintenance robot for equipment in space.

美国航天局的肢体动作机械工具机器人被设计用来维护机器人空间站。

NASA's Spitzer Space Telescope captured this image of comet Holmes in March 2008, five months after the comet suddenly erupted and brightened a millionfold overnight.

2008.3，美国宇航局的斯皮策太空望远镜拍摄的霍尔姆彗星图像，在此之前的5个月，这些彗星突然在夜空中出现，爆发出百万倍于原先亮度的光。

The "Ghost of Mirach" galaxy as seen in the ultraviolet. Image credit: NASA/JPL-CaltechNASA's Galaxy Evolution Explorer has lifted the veil off a ghost known to haunt the local universe, providing new insight into the formation and evolution of galaxies.

美国航空航天局的银河演化探测器最近成功揭开了宇宙中&幽灵&星系的神秘面纱，天文望远镜首次观察到&幽灵星系&的真实面貌，这一发现为认识星系的形成和演化提供了新的依据。

Sensor management for fault tolerant integrated inertal flight control reference and navigation system.PLAN'86-Position Location and Navigation Symposium. New York: Institute of Electrical and Electronics Engineers,1986.445～4554 Motyka P. Reliability analysis and fault-tolerant system: development for a redundant strapdown inertial measurement unit. NASA-

在利用陀螺的状态进行故障管理时，设计了一套具有软件冗余和时间冗余能力的容错算法，降低了虚报率和漏报率，提高了系统可靠性，实现了FO-FO-FO-FO-FS的容错能力。

NASA engineers is looking at photos and video of a torn solar pannel from the International Space Station.

美国航空航天局的工程师们正在研究从国际空间站发送回来的破损太阳能板的照片和录象。

NASA astronaunts performed the emergency surgery on a ripped solar pannel on the International Space Station .

美国航空航天局宇航员为国际空间站上的一个破损的太阳能发电板进行了紧急手术。

A partial eclipse is seen within the much broader path of the Moon's penumbral shadow, which includes northeastern North America, most of Europe and Asia . http://sunearth.gsfc.nasa.gov/eclipse/OH/OH2008.html

由月亮的半阴影造成的日偏蚀可在更广的区域被见到，包括北美的东北方、大部份的欧洲和亚洲。

"Microbes that produced methane from hydrogen and carbon dioxide were one of the earliest forms of life on Earth," notes Carl Pilcher, Director of the NASA Astrobiology Institute which partially supported the research.

&微生物产生的甲烷，氢气和二氧化碳是最早形式的地球上的生命，&注意到卡尔尔彻主任美国宇航局天体生物学研究所的研究部分支持。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。